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Diffstat (limited to 'contrib/perl5/lib/perl5db.pl')
| -rw-r--r-- | contrib/perl5/lib/perl5db.pl | 2183 |
1 files changed, 2183 insertions, 0 deletions
diff --git a/contrib/perl5/lib/perl5db.pl b/contrib/perl5/lib/perl5db.pl new file mode 100644 index 0000000..099a49b --- /dev/null +++ b/contrib/perl5/lib/perl5db.pl @@ -0,0 +1,2183 @@ +package DB; + +# Debugger for Perl 5.00x; perl5db.pl patch level: + +$VERSION = 1.0401; +$header = "perl5db.pl version $VERSION"; + +# Enhanced by ilya@math.ohio-state.edu (Ilya Zakharevich) +# Latest version available: ftp://ftp.math.ohio-state.edu/pub/users/ilya/perl + +# modified Perl debugger, to be run from Emacs in perldb-mode +# Ray Lischner (uunet!mntgfx!lisch) as of 5 Nov 1990 +# Johan Vromans -- upgrade to 4.0 pl 10 +# Ilya Zakharevich -- patches after 5.001 (and some before ;-) + +# +# This file is automatically included if you do perl -d. +# It's probably not useful to include this yourself. +# +# Perl supplies the values for %sub. It effectively inserts +# a &DB'DB(); in front of every place that can have a +# breakpoint. Instead of a subroutine call it calls &DB::sub with +# $DB::sub being the called subroutine. It also inserts a BEGIN +# {require 'perl5db.pl'} before the first line. +# +# After each `require'd file is compiled, but before it is executed, a +# call to DB::postponed($main::{'_<'.$filename}) is emulated. Here the +# $filename is the expanded name of the `require'd file (as found as +# value of %INC). +# +# Additional services from Perl interpreter: +# +# if caller() is called from the package DB, it provides some +# additional data. +# +# The array @{$main::{'_<'.$filename} is the line-by-line contents of +# $filename. +# +# The hash %{'_<'.$filename} contains breakpoints and action (it is +# keyed by line number), and individual entries are settable (as +# opposed to the whole hash). Only true/false is important to the +# interpreter, though the values used by perl5db.pl have the form +# "$break_condition\0$action". Values are magical in numeric context. +# +# The scalar ${'_<'.$filename} contains "_<$filename". +# +# Note that no subroutine call is possible until &DB::sub is defined +# (for subroutines defined outside of the package DB). In fact the same is +# true if $deep is not defined. +# +# $Log: perldb.pl,v $ + +# +# At start reads $rcfile that may set important options. This file +# may define a subroutine &afterinit that will be executed after the +# debugger is initialized. +# +# After $rcfile is read reads environment variable PERLDB_OPTS and parses +# it as a rest of `O ...' line in debugger prompt. +# +# The options that can be specified only at startup: +# [To set in $rcfile, call &parse_options("optionName=new_value").] +# +# TTY - the TTY to use for debugging i/o. +# +# noTTY - if set, goes in NonStop mode. On interrupt if TTY is not set +# uses the value of noTTY or "/tmp/perldbtty$$" to find TTY using +# Term::Rendezvous. Current variant is to have the name of TTY in this +# file. +# +# ReadLine - If false, dummy ReadLine is used, so you can debug +# ReadLine applications. +# +# NonStop - if true, no i/o is performed until interrupt. +# +# LineInfo - file or pipe to print line number info to. If it is a +# pipe, a short "emacs like" message is used. +# +# Example $rcfile: (delete leading hashes!) +# +# &parse_options("NonStop=1 LineInfo=db.out"); +# sub afterinit { $trace = 1; } +# +# The script will run without human intervention, putting trace +# information into db.out. (If you interrupt it, you would better +# reset LineInfo to something "interactive"!) +# +################################################################## +# Changelog: + +# A lot of things changed after 0.94. First of all, core now informs +# debugger about entry into XSUBs, overloaded operators, tied operations, +# BEGIN and END. Handy with `O f=2'. + +# This can make debugger a little bit too verbose, please be patient +# and report your problems promptly. + +# Now the option frame has 3 values: 0,1,2. + +# Note that if DESTROY returns a reference to the object (or object), +# the deletion of data may be postponed until the next function call, +# due to the need to examine the return value. + +# Changes: 0.95: `v' command shows versions. +# Changes: 0.96: `v' command shows version of readline. +# primitive completion works (dynamic variables, subs for `b' and `l', +# options). Can `p %var' +# Better help (`h <' now works). New commands <<, >>, {, {{. +# {dump|print}_trace() coded (to be able to do it from <<cmd). +# `c sub' documented. +# At last enough magic combined to stop after the end of debuggee. +# !! should work now (thanks to Emacs bracket matching an extra +# `]' in a regexp is caught). +# `L', `D' and `A' span files now (as documented). +# Breakpoints in `require'd code are possible (used in `R'). +# Some additional words on internal work of debugger. +# `b load filename' implemented. +# `b postpone subr' implemented. +# now only `q' exits debugger (overwriteable on $inhibit_exit). +# When restarting debugger breakpoints/actions persist. +# Buglet: When restarting debugger only one breakpoint/action per +# autoloaded function persists. +# Changes: 0.97: NonStop will not stop in at_exit(). +# Option AutoTrace implemented. +# Trace printed differently if frames are printed too. +# new `inhibitExit' option. +# printing of a very long statement interruptible. +# Changes: 0.98: New command `m' for printing possible methods +# 'l -' is a synonim for `-'. +# Cosmetic bugs in printing stack trace. +# `frame' & 8 to print "expanded args" in stack trace. +# Can list/break in imported subs. +# new `maxTraceLen' option. +# frame & 4 and frame & 8 granted. +# new command `m' +# nonstoppable lines do not have `:' near the line number. +# `b compile subname' implemented. +# Will not use $` any more. +# `-' behaves sane now. +# Changes: 0.99: Completion for `f', `m'. +# `m' will remove duplicate names instead of duplicate functions. +# `b load' strips trailing whitespace. +# completion ignores leading `|'; takes into account current package +# when completing a subroutine name (same for `l'). + +#################################################################### + +# Needed for the statement after exec(): + +BEGIN { $ini_warn = $^W; $^W = 0 } # Switch compilation warnings off until another BEGIN. +local($^W) = 0; # Switch run-time warnings off during init. +warn ( # Do not ;-) + $dumpvar::hashDepth, + $dumpvar::arrayDepth, + $dumpvar::dumpDBFiles, + $dumpvar::dumpPackages, + $dumpvar::quoteHighBit, + $dumpvar::printUndef, + $dumpvar::globPrint, + $dumpvar::usageOnly, + @ARGS, + $Carp::CarpLevel, + $panic, + $second_time, + ) if 0; + +# Command-line + PERLLIB: +@ini_INC = @INC; + +# $prevwarn = $prevdie = $prevbus = $prevsegv = ''; # Does not help?! + +$trace = $signal = $single = 0; # Uninitialized warning suppression + # (local $^W cannot help - other packages!). +$inhibit_exit = $option{PrintRet} = 1; + +@options = qw(hashDepth arrayDepth DumpDBFiles DumpPackages DumpReused + compactDump veryCompact quote HighBit undefPrint + globPrint PrintRet UsageOnly frame AutoTrace + TTY noTTY ReadLine NonStop LineInfo maxTraceLen + recallCommand ShellBang pager tkRunning ornaments + signalLevel warnLevel dieLevel inhibit_exit + ImmediateStop bareStringify); + +%optionVars = ( + hashDepth => \$dumpvar::hashDepth, + arrayDepth => \$dumpvar::arrayDepth, + DumpDBFiles => \$dumpvar::dumpDBFiles, + DumpPackages => \$dumpvar::dumpPackages, + DumpReused => \$dumpvar::dumpReused, + HighBit => \$dumpvar::quoteHighBit, + undefPrint => \$dumpvar::printUndef, + globPrint => \$dumpvar::globPrint, + UsageOnly => \$dumpvar::usageOnly, + bareStringify => \$dumpvar::bareStringify, + frame => \$frame, + AutoTrace => \$trace, + inhibit_exit => \$inhibit_exit, + maxTraceLen => \$maxtrace, + ImmediateStop => \$ImmediateStop, +); + +%optionAction = ( + compactDump => \&dumpvar::compactDump, + veryCompact => \&dumpvar::veryCompact, + quote => \&dumpvar::quote, + TTY => \&TTY, + noTTY => \&noTTY, + ReadLine => \&ReadLine, + NonStop => \&NonStop, + LineInfo => \&LineInfo, + recallCommand => \&recallCommand, + ShellBang => \&shellBang, + pager => \&pager, + signalLevel => \&signalLevel, + warnLevel => \&warnLevel, + dieLevel => \&dieLevel, + tkRunning => \&tkRunning, + ornaments => \&ornaments, + ); + +%optionRequire = ( + compactDump => 'dumpvar.pl', + veryCompact => 'dumpvar.pl', + quote => 'dumpvar.pl', + ); + +# These guys may be defined in $ENV{PERL5DB} : +$rl = 1 unless defined $rl; +$warnLevel = 1 unless defined $warnLevel; +$dieLevel = 1 unless defined $dieLevel; +$signalLevel = 1 unless defined $signalLevel; +$pre = [] unless defined $pre; +$post = [] unless defined $post; +$pretype = [] unless defined $pretype; +warnLevel($warnLevel); +dieLevel($dieLevel); +signalLevel($signalLevel); +&pager(defined($ENV{PAGER}) ? $ENV{PAGER} : "|more") unless defined $pager; +&recallCommand("!") unless defined $prc; +&shellBang("!") unless defined $psh; +$maxtrace = 400 unless defined $maxtrace; + +if (-e "/dev/tty") { + $rcfile=".perldb"; +} else { + $rcfile="perldb.ini"; +} + +if (-f $rcfile) { + do "./$rcfile"; +} elsif (defined $ENV{LOGDIR} and -f "$ENV{LOGDIR}/$rcfile") { + do "$ENV{LOGDIR}/$rcfile"; +} elsif (defined $ENV{HOME} and -f "$ENV{HOME}/$rcfile") { + do "$ENV{HOME}/$rcfile"; +} + +if (defined $ENV{PERLDB_OPTS}) { + parse_options($ENV{PERLDB_OPTS}); +} + +if (exists $ENV{PERLDB_RESTART}) { + delete $ENV{PERLDB_RESTART}; + # $restart = 1; + @hist = get_list('PERLDB_HIST'); + %break_on_load = get_list("PERLDB_ON_LOAD"); + %postponed = get_list("PERLDB_POSTPONE"); + my @had_breakpoints= get_list("PERLDB_VISITED"); + for (0 .. $#had_breakpoints) { + my %pf = get_list("PERLDB_FILE_$_"); + $postponed_file{$had_breakpoints[$_]} = \%pf if %pf; + } + my %opt = get_list("PERLDB_OPT"); + my ($opt,$val); + while (($opt,$val) = each %opt) { + $val =~ s/[\\\']/\\$1/g; + parse_options("$opt'$val'"); + } + @INC = get_list("PERLDB_INC"); + @ini_INC = @INC; + $pretype = [get_list("PERLDB_PRETYPE")]; + $pre = [get_list("PERLDB_PRE")]; + $post = [get_list("PERLDB_POST")]; + @typeahead = get_list("PERLDB_TYPEAHEAD", @typeahead); +} + +if ($notty) { + $runnonstop = 1; +} else { + # Is Perl being run from Emacs? + $emacs = ((defined $main::ARGV[0]) and ($main::ARGV[0] eq '-emacs')); + $rl = 0, shift(@main::ARGV) if $emacs; + + #require Term::ReadLine; + + if (-e "/dev/tty") { + $console = "/dev/tty"; + } elsif ($^O eq 'dos' or -e "con" or $^O eq 'MSWin32') { + $console = "con"; + } else { + $console = "sys\$command"; + } + + if (($^O eq 'MSWin32') and ($emacs or defined $ENV{EMACS})) { + $console = undef; + } + + # Around a bug: + if (defined $ENV{OS2_SHELL} and ($emacs or $ENV{WINDOWID})) { # In OS/2 + $console = undef; + } + + $console = $tty if defined $tty; + + if (defined $console) { + open(IN,"+<$console") || open(IN,"<$console") || open(IN,"<&STDIN"); + open(OUT,"+>$console") || open(OUT,">$console") || open(OUT,">&STDERR") + || open(OUT,">&STDOUT"); # so we don't dongle stdout + } else { + open(IN,"<&STDIN"); + open(OUT,">&STDERR") || open(OUT,">&STDOUT"); # so we don't dongle stdout + $console = 'STDIN/OUT'; + } + # so open("|more") can read from STDOUT and so we don't dingle stdin + $IN = \*IN; + + $OUT = \*OUT; + select($OUT); + $| = 1; # for DB::OUT + select(STDOUT); + + $LINEINFO = $OUT unless defined $LINEINFO; + $lineinfo = $console unless defined $lineinfo; + + $| = 1; # for real STDOUT + + $header =~ s/.Header: ([^,]+),v(\s+\S+\s+\S+).*$/$1$2/; + unless ($runnonstop) { + print $OUT "\nLoading DB routines from $header\n"; + print $OUT ("Emacs support ", + $emacs ? "enabled" : "available", + ".\n"); + print $OUT "\nEnter h or `h h' for help.\n\n"; + } +} + +@ARGS = @ARGV; +for (@args) { + s/\'/\\\'/g; + s/(.*)/'$1'/ unless /^-?[\d.]+$/; +} + +if (defined &afterinit) { # May be defined in $rcfile + &afterinit(); +} + +$I_m_init = 1; + +############################################################ Subroutines + +sub DB { + # _After_ the perl program is compiled, $single is set to 1: + if ($single and not $second_time++) { + if ($runnonstop) { # Disable until signal + for ($i=0; $i <= $#stack; ) { + $stack[$i++] &= ~1; + } + $single = 0; + # return; # Would not print trace! + } elsif ($ImmediateStop) { + $ImmediateStop = 0; + $signal = 1; + } + } + $runnonstop = 0 if $single or $signal; # Disable it if interactive. + &save; + ($package, $filename, $line) = caller; + $filename_ini = $filename; + $usercontext = '($@, $!, $^E, $,, $/, $\, $^W) = @saved;' . + "package $package;"; # this won't let them modify, alas + local(*dbline) = $main::{'_<' . $filename}; + $max = $#dbline; + if (($stop,$action) = split(/\0/,$dbline{$line})) { + if ($stop eq '1') { + $signal |= 1; + } elsif ($stop) { + $evalarg = "\$DB::signal |= 1 if do {$stop}"; &eval; + $dbline{$line} =~ s/;9($|\0)/$1/; + } + } + my $was_signal = $signal; + if ($trace & 2) { + for (my $n = 0; $n <= $#to_watch; $n++) { + $evalarg = $to_watch[$n]; + local $onetimeDump; # Do not output results + my ($val) = &eval; # Fix context (&eval is doing array)? + $val = ( (defined $val) ? "'$val'" : 'undef' ); + if ($val ne $old_watch[$n]) { + $signal = 1; + print $OUT <<EOP; +Watchpoint $n:\t$to_watch[$n] changed: + old value:\t$old_watch[$n] + new value:\t$val +EOP + $old_watch[$n] = $val; + } + } + } + if ($trace & 4) { # User-installed watch + return if watchfunction($package, $filename, $line) + and not $single and not $was_signal and not ($trace & ~4); + } + $was_signal = $signal; + $signal = 0; + if ($single || ($trace & 1) || $was_signal) { + $term || &setterm; + if ($emacs) { + $position = "\032\032$filename:$line:0\n"; + print $LINEINFO $position; + } elsif ($package eq 'DB::fake') { + print_help(<<EOP); +Debugged program terminated. Use B<q> to quit or B<R> to restart, + use B<O> I<inhibit_exit> to avoid stopping after program termination, + B<h q>, B<h R> or B<h O> to get additional info. +EOP + $package = 'main'; + $usercontext = '($@, $!, $,, $/, $\, $^W) = @saved;' . + "package $package;"; # this won't let them modify, alas + } else { + $sub =~ s/\'/::/; + $prefix = $sub =~ /::/ ? "" : "${'package'}::"; + $prefix .= "$sub($filename:"; + $after = ($dbline[$line] =~ /\n$/ ? '' : "\n"); + if (length($prefix) > 30) { + $position = "$prefix$line):\n$line:\t$dbline[$line]$after"; + $prefix = ""; + $infix = ":\t"; + } else { + $infix = "):\t"; + $position = "$prefix$line$infix$dbline[$line]$after"; + } + if ($frame) { + print $LINEINFO ' ' x $#stack, "$line:\t$dbline[$line]$after"; + } else { + print $LINEINFO $position; + } + for ($i = $line + 1; $i <= $max && $dbline[$i] == 0; ++$i) { #{ vi + last if $dbline[$i] =~ /^\s*[\;\}\#\n]/; + last if $signal; + $after = ($dbline[$i] =~ /\n$/ ? '' : "\n"); + $incr_pos = "$prefix$i$infix$dbline[$i]$after"; + $position .= $incr_pos; + if ($frame) { + print $LINEINFO ' ' x $#stack, "$i:\t$dbline[$i]$after"; + } else { + print $LINEINFO $incr_pos; + } + } + } + } + $evalarg = $action, &eval if $action; + if ($single || $was_signal) { + local $level = $level + 1; + foreach $evalarg (@$pre) { + &eval; + } + print $OUT $#stack . " levels deep in subroutine calls!\n" + if $single & 4; + $start = $line; + $incr = -1; # for backward motion. + @typeahead = @$pretype, @typeahead; + CMD: + while (($term || &setterm), + ($term_pid == $$ or &resetterm), + defined ($cmd=&readline(" DB" . ('<' x $level) . + ($#hist+1) . ('>' x $level) . + " "))) { + $single = 0; + $signal = 0; + $cmd =~ s/\\$/\n/ && do { + $cmd .= &readline(" cont: "); + redo CMD; + }; + $cmd =~ /^$/ && ($cmd = $laststep); + push(@hist,$cmd) if length($cmd) > 1; + PIPE: { + ($i) = split(/\s+/,$cmd); + eval "\$cmd =~ $alias{$i}", print $OUT $@ if $alias{$i}; + $cmd =~ /^q$/ && ($exiting = 1) && exit 0; + $cmd =~ /^h$/ && do { + print_help($help); + next CMD; }; + $cmd =~ /^h\s+h$/ && do { + print_help($summary); + next CMD; }; + $cmd =~ /^h\s+(\S)$/ && do { + my $asked = "\Q$1"; + if ($help =~ /^(?:[IB]<)$asked/m) { + while ($help =~ /^((?:[IB]<)$asked([\s\S]*?)\n)(?!\s)/mg) { + print_help($1); + } + } else { + print_help("B<$asked> is not a debugger command.\n"); + } + next CMD; }; + $cmd =~ /^t$/ && do { + ($trace & 1) ? ($trace &= ~1) : ($trace |= 1); + print $OUT "Trace = " . + (($trace & 1) ? "on" : "off" ) . "\n"; + next CMD; }; + $cmd =~ /^S(\s+(!)?(.+))?$/ && do { + $Srev = defined $2; $Spatt = $3; $Snocheck = ! defined $1; + foreach $subname (sort(keys %sub)) { + if ($Snocheck or $Srev^($subname =~ /$Spatt/)) { + print $OUT $subname,"\n"; + } + } + next CMD; }; + $cmd =~ /^v$/ && do { + list_versions(); next CMD}; + $cmd =~ s/^X\b/V $package/; + $cmd =~ /^V$/ && do { + $cmd = "V $package"; }; + $cmd =~ /^V\b\s*(\S+)\s*(.*)/ && do { + local ($savout) = select($OUT); + $packname = $1; + @vars = split(' ',$2); + do 'dumpvar.pl' unless defined &main::dumpvar; + if (defined &main::dumpvar) { + local $frame = 0; + local $doret = -2; + &main::dumpvar($packname,@vars); + } else { + print $OUT "dumpvar.pl not available.\n"; + } + select ($savout); + next CMD; }; + $cmd =~ s/^x\b/ / && do { # So that will be evaled + $onetimeDump = 'dump'; }; + $cmd =~ s/^m\s+([\w:]+)\s*$/ / && do { + methods($1); next CMD}; + $cmd =~ s/^m\b/ / && do { # So this will be evaled + $onetimeDump = 'methods'; }; + $cmd =~ /^f\b\s*(.*)/ && do { + $file = $1; + $file =~ s/\s+$//; + if (!$file) { + print $OUT "The old f command is now the r command.\n"; + print $OUT "The new f command switches filenames.\n"; + next CMD; + } + if (!defined $main::{'_<' . $file}) { + if (($try) = grep(m#^_<.*$file#, keys %main::)) {{ + $try = substr($try,2); + print $OUT "Choosing $try matching `$file':\n"; + $file = $try; + }} + } + if (!defined $main::{'_<' . $file}) { + print $OUT "No file matching `$file' is loaded.\n"; + next CMD; + } elsif ($file ne $filename) { + *dbline = $main::{'_<' . $file}; + $max = $#dbline; + $filename = $file; + $start = 1; + $cmd = "l"; + } else { + print $OUT "Already in $file.\n"; + next CMD; + } + }; + $cmd =~ s/^l\s+-\s*$/-/; + $cmd =~ /^l\b\s*([\':A-Za-z_][\':\w]*)/ && do { + $subname = $1; + $subname =~ s/\'/::/; + $subname = $package."::".$subname + unless $subname =~ /::/; + $subname = "main".$subname if substr($subname,0,2) eq "::"; + @pieces = split(/:/,find_sub($subname)); + $subrange = pop @pieces; + $file = join(':', @pieces); + if ($file ne $filename) { + *dbline = $main::{'_<' . $file}; + $max = $#dbline; + $filename = $file; + } + if ($subrange) { + if (eval($subrange) < -$window) { + $subrange =~ s/-.*/+/; + } + $cmd = "l $subrange"; + } else { + print $OUT "Subroutine $subname not found.\n"; + next CMD; + } }; + $cmd =~ /^\.$/ && do { + $incr = -1; # for backward motion. + $start = $line; + $filename = $filename_ini; + *dbline = $main::{'_<' . $filename}; + $max = $#dbline; + print $LINEINFO $position; + next CMD }; + $cmd =~ /^w\b\s*(\d*)$/ && do { + $incr = $window - 1; + $start = $1 if $1; + $start -= $preview; + #print $OUT 'l ' . $start . '-' . ($start + $incr); + $cmd = 'l ' . $start . '-' . ($start + $incr); }; + $cmd =~ /^-$/ && do { + $start -= $incr + $window + 1; + $start = 1 if $start <= 0; + $incr = $window - 1; + $cmd = 'l ' . ($start) . '+'; }; + $cmd =~ /^l$/ && do { + $incr = $window - 1; + $cmd = 'l ' . $start . '-' . ($start + $incr); }; + $cmd =~ /^l\b\s*(\d*)\+(\d*)$/ && do { + $start = $1 if $1; + $incr = $2; + $incr = $window - 1 unless $incr; + $cmd = 'l ' . $start . '-' . ($start + $incr); }; + $cmd =~ /^l\b\s*((-?[\d\$\.]+)([-,]([\d\$\.]+))?)?/ && do { + $end = (!defined $2) ? $max : ($4 ? $4 : $2); + $end = $max if $end > $max; + $i = $2; + $i = $line if $i eq '.'; + $i = 1 if $i < 1; + $incr = $end - $i; + if ($emacs) { + print $OUT "\032\032$filename:$i:0\n"; + $i = $end; + } else { + for (; $i <= $end; $i++) { + ($stop,$action) = split(/\0/, $dbline{$i}); + $arrow = ($i==$line + and $filename eq $filename_ini) + ? '==>' + : ($dbline[$i]+0 ? ':' : ' ') ; + $arrow .= 'b' if $stop; + $arrow .= 'a' if $action; + print $OUT "$i$arrow\t", $dbline[$i]; + last if $signal; + } + } + $start = $i; # remember in case they want more + $start = $max if $start > $max; + next CMD; }; + $cmd =~ /^D$/ && do { + print $OUT "Deleting all breakpoints...\n"; + my $file; + for $file (keys %had_breakpoints) { + local *dbline = $main::{'_<' . $file}; + my $max = $#dbline; + my $was; + + for ($i = 1; $i <= $max ; $i++) { + if (defined $dbline{$i}) { + $dbline{$i} =~ s/^[^\0]+//; + if ($dbline{$i} =~ s/^\0?$//) { + delete $dbline{$i}; + } + } + } + } + undef %postponed; + undef %postponed_file; + undef %break_on_load; + undef %had_breakpoints; + next CMD; }; + $cmd =~ /^L$/ && do { + my $file; + for $file (keys %had_breakpoints) { + local *dbline = $main::{'_<' . $file}; + my $max = $#dbline; + my $was; + + for ($i = 1; $i <= $max; $i++) { + if (defined $dbline{$i}) { + print "$file:\n" unless $was++; + print $OUT " $i:\t", $dbline[$i]; + ($stop,$action) = split(/\0/, $dbline{$i}); + print $OUT " break if (", $stop, ")\n" + if $stop; + print $OUT " action: ", $action, "\n" + if $action; + last if $signal; + } + } + } + if (%postponed) { + print $OUT "Postponed breakpoints in subroutines:\n"; + my $subname; + for $subname (keys %postponed) { + print $OUT " $subname\t$postponed{$subname}\n"; + last if $signal; + } + } + my @have = map { # Combined keys + keys %{$postponed_file{$_}} + } keys %postponed_file; + if (@have) { + print $OUT "Postponed breakpoints in files:\n"; + my ($file, $line); + for $file (keys %postponed_file) { + my $db = $postponed_file{$file}; + print $OUT " $file:\n"; + for $line (sort {$a <=> $b} keys %$db) { + print $OUT " $line:\n"; + my ($stop,$action) = split(/\0/, $$db{$line}); + print $OUT " break if (", $stop, ")\n" + if $stop; + print $OUT " action: ", $action, "\n" + if $action; + last if $signal; + } + last if $signal; + } + } + if (%break_on_load) { + print $OUT "Breakpoints on load:\n"; + my $file; + for $file (keys %break_on_load) { + print $OUT " $file\n"; + last if $signal; + } + } + if ($trace & 2) { + print $OUT "Watch-expressions:\n"; + my $expr; + for $expr (@to_watch) { + print $OUT " $expr\n"; + last if $signal; + } + } + next CMD; }; + $cmd =~ /^b\b\s*load\b\s*(.*)/ && do { + my $file = $1; $file =~ s/\s+$//; + { + $break_on_load{$file} = 1; + $break_on_load{$::INC{$file}} = 1 if $::INC{$file}; + $file .= '.pm', redo unless $file =~ /\./; + } + $had_breakpoints{$file} = 1; + print $OUT "Will stop on load of `@{[join '\', `', sort keys %break_on_load]}'.\n"; + next CMD; }; + $cmd =~ /^b\b\s*(postpone|compile)\b\s*([':A-Za-z_][':\w]*)\s*(.*)/ && do { + my $cond = $3 || '1'; + my ($subname, $break) = ($2, $1 eq 'postpone'); + $subname =~ s/\'/::/; + $subname = "${'package'}::" . $subname + unless $subname =~ /::/; + $subname = "main".$subname if substr($subname,0,2) eq "::"; + $postponed{$subname} = $break + ? "break +0 if $cond" : "compile"; + next CMD; }; + $cmd =~ /^b\b\s*([':A-Za-z_][':\w]*)\s*(.*)/ && do { + $subname = $1; + $cond = $2 || '1'; + $subname =~ s/\'/::/; + $subname = "${'package'}::" . $subname + unless $subname =~ /::/; + $subname = "main".$subname if substr($subname,0,2) eq "::"; + # Filename below can contain ':' + ($file,$i) = (find_sub($subname) =~ /^(.*):(.*)$/); + $i += 0; + if ($i) { + $filename = $file; + *dbline = $main::{'_<' . $filename}; + $had_breakpoints{$filename} = 1; + $max = $#dbline; + ++$i while $dbline[$i] == 0 && $i < $max; + $dbline{$i} =~ s/^[^\0]*/$cond/; + } else { + print $OUT "Subroutine $subname not found.\n"; + } + next CMD; }; + $cmd =~ /^b\b\s*(\d*)\s*(.*)/ && do { + $i = ($1?$1:$line); + $cond = $2 || '1'; + if ($dbline[$i] == 0) { + print $OUT "Line $i not breakable.\n"; + } else { + $had_breakpoints{$filename} = 1; + $dbline{$i} =~ s/^[^\0]*/$cond/; + } + next CMD; }; + $cmd =~ /^d\b\s*(\d+)?/ && do { + $i = ($1?$1:$line); + $dbline{$i} =~ s/^[^\0]*//; + delete $dbline{$i} if $dbline{$i} eq ''; + next CMD; }; + $cmd =~ /^A$/ && do { + my $file; + for $file (keys %had_breakpoints) { + local *dbline = $main::{'_<' . $file}; + my $max = $#dbline; + my $was; + + for ($i = 1; $i <= $max ; $i++) { + if (defined $dbline{$i}) { + $dbline{$i} =~ s/\0[^\0]*//; + delete $dbline{$i} if $dbline{$i} eq ''; + } + } + } + next CMD; }; + $cmd =~ /^O\s*$/ && do { + for (@options) { + &dump_option($_); + } + next CMD; }; + $cmd =~ /^O\s*(\S.*)/ && do { + parse_options($1); + next CMD; }; + $cmd =~ /^\<\<\s*(.*)/ && do { # \<\< for CPerl sake: not HERE + push @$pre, action($1); + next CMD; }; + $cmd =~ /^>>\s*(.*)/ && do { + push @$post, action($1); + next CMD; }; + $cmd =~ /^<\s*(.*)/ && do { + $pre = [], next CMD unless $1; + $pre = [action($1)]; + next CMD; }; + $cmd =~ /^>\s*(.*)/ && do { + $post = [], next CMD unless $1; + $post = [action($1)]; + next CMD; }; + $cmd =~ /^\{\{\s*(.*)/ && do { + push @$pretype, $1; + next CMD; }; + $cmd =~ /^\{\s*(.*)/ && do { + $pretype = [], next CMD unless $1; + $pretype = [$1]; + next CMD; }; + $cmd =~ /^a\b\s*(\d+)(\s+(.*))?/ && do { + $i = $1; $j = $3; + if ($dbline[$i] == 0) { + print $OUT "Line $i may not have an action.\n"; + } else { + $dbline{$i} =~ s/\0[^\0]*//; + $dbline{$i} .= "\0" . action($j); + } + next CMD; }; + $cmd =~ /^n$/ && do { + end_report(), next CMD if $finished and $level <= 1; + $single = 2; + $laststep = $cmd; + last CMD; }; + $cmd =~ /^s$/ && do { + end_report(), next CMD if $finished and $level <= 1; + $single = 1; + $laststep = $cmd; + last CMD; }; + $cmd =~ /^c\b\s*([\w:]*)\s*$/ && do { + end_report(), next CMD if $finished and $level <= 1; + $subname = $i = $1; + if ($i =~ /\D/) { # subroutine name + $subname = $package."::".$subname + unless $subname =~ /::/; + ($file,$i) = (find_sub($subname) =~ /^(.*):(.*)$/); + $i += 0; + if ($i) { + $filename = $file; + *dbline = $main::{'_<' . $filename}; + $had_breakpoints{$filename}++; + $max = $#dbline; + ++$i while $dbline[$i] == 0 && $i < $max; + } else { + print $OUT "Subroutine $subname not found.\n"; + next CMD; + } + } + if ($i) { + if ($dbline[$i] == 0) { + print $OUT "Line $i not breakable.\n"; + next CMD; + } + $dbline{$i} =~ s/($|\0)/;9$1/; # add one-time-only b.p. + } + for ($i=0; $i <= $#stack; ) { + $stack[$i++] &= ~1; + } + last CMD; }; + $cmd =~ /^r$/ && do { + end_report(), next CMD if $finished and $level <= 1; + $stack[$#stack] |= 1; + $doret = $option{PrintRet} ? $#stack - 1 : -2; + last CMD; }; + $cmd =~ /^R$/ && do { + print $OUT "Warning: some settings and command-line options may be lost!\n"; + my (@script, @flags, $cl); + push @flags, '-w' if $ini_warn; + # Put all the old includes at the start to get + # the same debugger. + for (@ini_INC) { + push @flags, '-I', $_; + } + # Arrange for setting the old INC: + set_list("PERLDB_INC", @ini_INC); + if ($0 eq '-e') { + for (1..$#{'::_<-e'}) { # The first line is PERL5DB + chomp ($cl = $ {'::_<-e'}[$_]); + push @script, '-e', $cl; + } + } else { + @script = $0; + } + set_list("PERLDB_HIST", + $term->Features->{getHistory} + ? $term->GetHistory : @hist); + my @had_breakpoints = keys %had_breakpoints; + set_list("PERLDB_VISITED", @had_breakpoints); + set_list("PERLDB_OPT", %option); + set_list("PERLDB_ON_LOAD", %break_on_load); + my @hard; + for (0 .. $#had_breakpoints) { + my $file = $had_breakpoints[$_]; + *dbline = $main::{'_<' . $file}; + next unless %dbline or $postponed_file{$file}; + (push @hard, $file), next + if $file =~ /^\(eval \d+\)$/; + my @add; + @add = %{$postponed_file{$file}} + if $postponed_file{$file}; + set_list("PERLDB_FILE_$_", %dbline, @add); + } + for (@hard) { # Yes, really-really... + # Find the subroutines in this eval + *dbline = $main::{'_<' . $_}; + my ($quoted, $sub, %subs, $line) = quotemeta $_; + for $sub (keys %sub) { + next unless $sub{$sub} =~ /^$quoted:(\d+)-(\d+)$/; + $subs{$sub} = [$1, $2]; + } + unless (%subs) { + print $OUT + "No subroutines in $_, ignoring breakpoints.\n"; + next; + } + LINES: for $line (keys %dbline) { + # One breakpoint per sub only: + my ($offset, $sub, $found); + SUBS: for $sub (keys %subs) { + if ($subs{$sub}->[1] >= $line # Not after the subroutine + and (not defined $offset # Not caught + or $offset < 0 )) { # or badly caught + $found = $sub; + $offset = $line - $subs{$sub}->[0]; + $offset = "+$offset", last SUBS if $offset >= 0; + } + } + if (defined $offset) { + $postponed{$found} = + "break $offset if $dbline{$line}"; + } else { + print $OUT "Breakpoint in $_:$line ignored: after all the subroutines.\n"; + } + } + } + set_list("PERLDB_POSTPONE", %postponed); + set_list("PERLDB_PRETYPE", @$pretype); + set_list("PERLDB_PRE", @$pre); + set_list("PERLDB_POST", @$post); + set_list("PERLDB_TYPEAHEAD", @typeahead); + $ENV{PERLDB_RESTART} = 1; + #print "$^X, '-d', @flags, @script, ($emacs ? '-emacs' : ()), @ARGS"; + exec $^X, '-d', @flags, @script, ($emacs ? '-emacs' : ()), @ARGS; + print $OUT "exec failed: $!\n"; + last CMD; }; + $cmd =~ /^T$/ && do { + print_trace($OUT, 1); # skip DB + next CMD; }; + $cmd =~ /^W\s*$/ && do { + $trace &= ~2; + @to_watch = @old_watch = (); + next CMD; }; + $cmd =~ /^W\b\s*(.*)/s && do { + push @to_watch, $1; + $evalarg = $1; + my ($val) = &eval; + $val = (defined $val) ? "'$val'" : 'undef' ; + push @old_watch, $val; + $trace |= 2; + next CMD; }; + $cmd =~ /^\/(.*)$/ && do { + $inpat = $1; + $inpat =~ s:([^\\])/$:$1:; + if ($inpat ne "") { + eval '$inpat =~ m'."\a$inpat\a"; + if ($@ ne "") { + print $OUT "$@"; + next CMD; + } + $pat = $inpat; + } + $end = $start; + $incr = -1; + eval ' + for (;;) { + ++$start; + $start = 1 if ($start > $max); + last if ($start == $end); + if ($dbline[$start] =~ m' . "\a$pat\a" . 'i) { + if ($emacs) { + print $OUT "\032\032$filename:$start:0\n"; + } else { + print $OUT "$start:\t", $dbline[$start], "\n"; + } + last; + } + } '; + print $OUT "/$pat/: not found\n" if ($start == $end); + next CMD; }; + $cmd =~ /^\?(.*)$/ && do { + $inpat = $1; + $inpat =~ s:([^\\])\?$:$1:; + if ($inpat ne "") { + eval '$inpat =~ m'."\a$inpat\a"; + if ($@ ne "") { + print $OUT "$@"; + next CMD; + } + $pat = $inpat; + } + $end = $start; + $incr = -1; + eval ' + for (;;) { + --$start; + $start = $max if ($start <= 0); + last if ($start == $end); + if ($dbline[$start] =~ m' . "\a$pat\a" . 'i) { + if ($emacs) { + print $OUT "\032\032$filename:$start:0\n"; + } else { + print $OUT "$start:\t", $dbline[$start], "\n"; + } + last; + } + } '; + print $OUT "?$pat?: not found\n" if ($start == $end); + next CMD; }; + $cmd =~ /^$rc+\s*(-)?(\d+)?$/ && do { + pop(@hist) if length($cmd) > 1; + $i = $1 ? ($#hist-($2?$2:1)) : ($2?$2:$#hist); + $cmd = $hist[$i]; + print $OUT $cmd; + redo CMD; }; + $cmd =~ /^$sh$sh\s*([\x00-\xff]*)/ && do { + &system($1); + next CMD; }; + $cmd =~ /^$rc([^$rc].*)$/ && do { + $pat = "^$1"; + pop(@hist) if length($cmd) > 1; + for ($i = $#hist; $i; --$i) { + last if $hist[$i] =~ /$pat/; + } + if (!$i) { + print $OUT "No such command!\n\n"; + next CMD; + } + $cmd = $hist[$i]; + print $OUT $cmd; + redo CMD; }; + $cmd =~ /^$sh$/ && do { + &system($ENV{SHELL}||"/bin/sh"); + next CMD; }; + $cmd =~ /^$sh\s*([\x00-\xff]*)/ && do { + &system($ENV{SHELL}||"/bin/sh","-c",$1); + next CMD; }; + $cmd =~ /^H\b\s*(-(\d+))?/ && do { + $end = $2?($#hist-$2):0; + $hist = 0 if $hist < 0; + for ($i=$#hist; $i>$end; $i--) { + print $OUT "$i: ",$hist[$i],"\n" + unless $hist[$i] =~ /^.?$/; + }; + next CMD; }; + $cmd =~ s/^p$/print {\$DB::OUT} \$_/; + $cmd =~ s/^p\b/print {\$DB::OUT} /; + $cmd =~ /^=/ && do { + if (local($k,$v) = ($cmd =~ /^=\s*(\S+)\s+(.*)/)) { + $alias{$k}="s~$k~$v~"; + print $OUT "$k = $v\n"; + } elsif ($cmd =~ /^=\s*$/) { + foreach $k (sort keys(%alias)) { + if (($v = $alias{$k}) =~ s~^s\~$k\~(.*)\~$~$1~) { + print $OUT "$k = $v\n"; + } else { + print $OUT "$k\t$alias{$k}\n"; + }; + }; + }; + next CMD; }; + $cmd =~ /^\|\|?\s*[^|]/ && do { + if ($pager =~ /^\|/) { + open(SAVEOUT,">&STDOUT") || &warn("Can't save STDOUT"); + open(STDOUT,">&OUT") || &warn("Can't redirect STDOUT"); + } else { + open(SAVEOUT,">&OUT") || &warn("Can't save DB::OUT"); + } + unless ($piped=open(OUT,$pager)) { + &warn("Can't pipe output to `$pager'"); + if ($pager =~ /^\|/) { + open(OUT,">&STDOUT") || &warn("Can't restore DB::OUT"); + open(STDOUT,">&SAVEOUT") + || &warn("Can't restore STDOUT"); + close(SAVEOUT); + } else { + open(OUT,">&STDOUT") || &warn("Can't restore DB::OUT"); + } + next CMD; + } + $SIG{PIPE}= \&DB::catch if $pager =~ /^\|/ + && "" eq $SIG{PIPE} || "DEFAULT" eq $SIG{PIPE}; + $selected= select(OUT); + $|= 1; + select( $selected ), $selected= "" unless $cmd =~ /^\|\|/; + $cmd =~ s/^\|+\s*//; + redo PIPE; }; + # XXX Local variants do not work! + $cmd =~ s/^t\s/\$DB::trace |= 1;\n/; + $cmd =~ s/^s\s/\$DB::single = 1;\n/ && do {$laststep = 's'}; + $cmd =~ s/^n\s/\$DB::single = 2;\n/ && do {$laststep = 'n'}; + } # PIPE: + $evalarg = "\$^D = \$^D | \$DB::db_stop;\n$cmd"; &eval; + if ($onetimeDump) { + $onetimeDump = undef; + } elsif ($term_pid == $$) { + print $OUT "\n"; + } + } continue { # CMD: + if ($piped) { + if ($pager =~ /^\|/) { + $?= 0; close(OUT) || &warn("Can't close DB::OUT"); + &warn( "Pager `$pager' failed: ", + ($?>>8) > 128 ? ($?>>8)-256 : ($?>>8), + ( $? & 128 ) ? " (core dumped)" : "", + ( $? & 127 ) ? " (SIG ".($?&127).")" : "", "\n" ) if $?; + open(OUT,">&STDOUT") || &warn("Can't restore DB::OUT"); + open(STDOUT,">&SAVEOUT") || &warn("Can't restore STDOUT"); + $SIG{PIPE}= "DEFAULT" if $SIG{PIPE} eq \&DB::catch; + # Will stop ignoring SIGPIPE if done like nohup(1) + # does SIGINT but Perl doesn't give us a choice. + } else { + open(OUT,">&SAVEOUT") || &warn("Can't restore DB::OUT"); + } + close(SAVEOUT); + select($selected), $selected= "" unless $selected eq ""; + $piped= ""; + } + } # CMD: + $exiting = 1 unless defined $cmd; + foreach $evalarg (@$post) { + &eval; + } + } # if ($single || $signal) + ($@, $!, $^E, $,, $/, $\, $^W) = @saved; + (); +} + +# The following code may be executed now: +# BEGIN {warn 4} + +sub sub { + my ($al, $ret, @ret) = ""; + if (length($sub) > 10 && substr($sub, -10, 10) eq '::AUTOLOAD') { + $al = " for $$sub"; + } + push(@stack, $single); + $single &= 1; + $single |= 4 if $#stack == $deep; + ($frame & 4 + ? ( (print $LINEINFO ' ' x ($#stack - 1), "in "), + # Why -1? But it works! :-( + print_trace($LINEINFO, -1, 1, 1, "$sub$al") ) + : print $LINEINFO ' ' x ($#stack - 1), "entering $sub$al\n") if $frame; + if (wantarray) { + @ret = &$sub; + $single |= pop(@stack); + ($frame & 4 + ? ( (print $LINEINFO ' ' x $#stack, "out "), + print_trace($LINEINFO, -1, 1, 1, "$sub$al") ) + : print $LINEINFO ' ' x $#stack, "exited $sub$al\n") if $frame & 2; + if ($doret eq $#stack or $frame & 16) { + my $fh = ($doret eq $#stack ? $OUT : $LINEINFO); + print $fh ' ' x $#stack if $frame & 16; + print $fh "list context return from $sub:\n"; + dumpit($fh, \@ret ); + $doret = -2; + } + @ret; + } else { + if (defined wantarray) { + $ret = &$sub; + } else { + &$sub; undef $ret; + }; + $single |= pop(@stack); + ($frame & 4 + ? ( (print $LINEINFO ' ' x $#stack, "out "), + print_trace($LINEINFO, -1, 1, 1, "$sub$al") ) + : print $LINEINFO ' ' x $#stack, "exited $sub$al\n") if $frame & 2; + if ($doret eq $#stack or $frame & 16 and defined wantarray) { + my $fh = ($doret eq $#stack ? $OUT : $LINEINFO); + print $fh (' ' x $#stack) if $frame & 16; + print $fh (defined wantarray + ? "scalar context return from $sub: " + : "void context return from $sub\n"); + dumpit( $fh, $ret ) if defined wantarray; + $doret = -2; + } + $ret; + } +} + +sub save { + @saved = ($@, $!, $^E, $,, $/, $\, $^W); + $, = ""; $/ = "\n"; $\ = ""; $^W = 0; +} + +# The following takes its argument via $evalarg to preserve current @_ + +sub eval { + my @res; + { + local (@stack) = @stack; # guard against recursive debugging + my $otrace = $trace; + my $osingle = $single; + my $od = $^D; + @res = eval "$usercontext $evalarg;\n"; # '\n' for nice recursive debug + $trace = $otrace; + $single = $osingle; + $^D = $od; + } + my $at = $@; + local $saved[0]; # Preserve the old value of $@ + eval { &DB::save }; + if ($at) { + print $OUT $at; + } elsif ($onetimeDump eq 'dump') { + dumpit($OUT, \@res); + } elsif ($onetimeDump eq 'methods') { + methods($res[0]); + } + @res; +} + +sub postponed_sub { + my $subname = shift; + if ($postponed{$subname} =~ s/^break\s([+-]?\d+)\s+if\s//) { + my $offset = $1 || 0; + # Filename below can contain ':' + my ($file,$i) = (find_sub($subname) =~ /^(.*):(\d+)-.*$/); + if ($i) { + $i += $offset; + local *dbline = $main::{'_<' . $file}; + local $^W = 0; # != 0 is magical below + $had_breakpoints{$file}++; + my $max = $#dbline; + ++$i until $dbline[$i] != 0 or $i >= $max; + $dbline{$i} = delete $postponed{$subname}; + } else { + print $OUT "Subroutine $subname not found.\n"; + } + return; + } + elsif ($postponed{$subname} eq 'compile') { $signal = 1 } + #print $OUT "In postponed_sub for `$subname'.\n"; +} + +sub postponed { + if ($ImmediateStop) { + $ImmediateStop = 0; + $signal = 1; + } + return &postponed_sub + unless ref \$_[0] eq 'GLOB'; # A subroutine is compiled. + # Cannot be done before the file is compiled + local *dbline = shift; + my $filename = $dbline; + $filename =~ s/^_<//; + $signal = 1, print $OUT "'$filename' loaded...\n" + if $break_on_load{$filename}; + print $LINEINFO ' ' x $#stack, "Package $filename.\n" if $frame; + return unless $postponed_file{$filename}; + $had_breakpoints{$filename}++; + #%dbline = %{$postponed_file{$filename}}; # Cannot be done: unsufficient magic + my $key; + for $key (keys %{$postponed_file{$filename}}) { + $dbline{$key} = $ {$postponed_file{$filename}}{$key}; + } + delete $postponed_file{$filename}; +} + +sub dumpit { + local ($savout) = select(shift); + my $osingle = $single; + my $otrace = $trace; + $single = $trace = 0; + local $frame = 0; + local $doret = -2; + unless (defined &main::dumpValue) { + do 'dumpvar.pl'; + } + if (defined &main::dumpValue) { + &main::dumpValue(shift); + } else { + print $OUT "dumpvar.pl not available.\n"; + } + $single = $osingle; + $trace = $otrace; + select ($savout); +} + +# Tied method do not create a context, so may get wrong message: + +sub print_trace { + my $fh = shift; + my @sub = dump_trace($_[0] + 1, $_[1]); + my $short = $_[2]; # Print short report, next one for sub name + my $s; + for ($i=0; $i <= $#sub; $i++) { + last if $signal; + local $" = ', '; + my $args = defined $sub[$i]{args} + ? "(@{ $sub[$i]{args} })" + : '' ; + $args = (substr $args, 0, $maxtrace - 3) . '...' + if length $args > $maxtrace; + my $file = $sub[$i]{file}; + $file = $file eq '-e' ? $file : "file `$file'" unless $short; + $s = $sub[$i]{sub}; + $s = (substr $s, 0, $maxtrace - 3) . '...' if length $s > $maxtrace; + if ($short) { + my $sub = @_ >= 4 ? $_[3] : $s; + print $fh "$sub[$i]{context}=$sub$args from $file:$sub[$i]{line}\n"; + } else { + print $fh "$sub[$i]{context} = $s$args" . + " called from $file" . + " line $sub[$i]{line}\n"; + } + } +} + +sub dump_trace { + my $skip = shift; + my $count = shift || 1e9; + $skip++; + $count += $skip; + my ($p,$file,$line,$sub,$h,$args,$e,$r,@a,@sub,$context); + my $nothard = not $frame & 8; + local $frame = 0; # Do not want to trace this. + my $otrace = $trace; + $trace = 0; + for ($i = $skip; + $i < $count and ($p,$file,$line,$sub,$h,$context,$e,$r) = caller($i); + $i++) { + @a = (); + for $arg (@args) { + my $type; + if (not defined $arg) { + push @a, "undef"; + } elsif ($nothard and tied $arg) { + push @a, "tied"; + } elsif ($nothard and $type = ref $arg) { + push @a, "ref($type)"; + } else { + local $_ = "$arg"; # Safe to stringify now - should not call f(). + s/([\'\\])/\\$1/g; + s/(.*)/'$1'/s + unless /^(?: -?[\d.]+ | \*[\w:]* )$/x; + s/([\200-\377])/sprintf("M-%c",ord($1)&0177)/eg; + s/([\0-\37\177])/sprintf("^%c",ord($1)^64)/eg; + push(@a, $_); + } + } + $context = $context ? '@' : (defined $context ? "\$" : '.'); + $args = $h ? [@a] : undef; + $e =~ s/\n\s*\;\s*\Z// if $e; + $e =~ s/([\\\'])/\\$1/g if $e; + if ($r) { + $sub = "require '$e'"; + } elsif (defined $r) { + $sub = "eval '$e'"; + } elsif ($sub eq '(eval)') { + $sub = "eval {...}"; + } + push(@sub, {context => $context, sub => $sub, args => $args, + file => $file, line => $line}); + last if $signal; + } + $trace = $otrace; + @sub; +} + +sub action { + my $action = shift; + while ($action =~ s/\\$//) { + #print $OUT "+ "; + #$action .= "\n"; + $action .= &gets; + } + $action; +} + +sub gets { + local($.); + #<IN>; + &readline("cont: "); +} + +sub system { + # We save, change, then restore STDIN and STDOUT to avoid fork() since + # many non-Unix systems can do system() but have problems with fork(). + open(SAVEIN,"<&STDIN") || &warn("Can't save STDIN"); + open(SAVEOUT,">&STDOUT") || &warn("Can't save STDOUT"); + open(STDIN,"<&IN") || &warn("Can't redirect STDIN"); + open(STDOUT,">&OUT") || &warn("Can't redirect STDOUT"); + system(@_); + open(STDIN,"<&SAVEIN") || &warn("Can't restore STDIN"); + open(STDOUT,">&SAVEOUT") || &warn("Can't restore STDOUT"); + close(SAVEIN); close(SAVEOUT); + &warn( "(Command returned ", ($?>>8) > 128 ? ($?>>8)-256 : ($?>>8), ")", + ( $? & 128 ) ? " (core dumped)" : "", + ( $? & 127 ) ? " (SIG ".($?&127).")" : "", "\n" ) if $?; + $?; +} + +sub setterm { + local $frame = 0; + local $doret = -2; + local @stack = @stack; # Prevent growth by failing `use'. + eval { require Term::ReadLine } or die $@; + if ($notty) { + if ($tty) { + open(IN,"<$tty") or die "Cannot open TTY `$TTY' for read: $!"; + open(OUT,">$tty") or die "Cannot open TTY `$TTY' for write: $!"; + $IN = \*IN; + $OUT = \*OUT; + my $sel = select($OUT); + $| = 1; + select($sel); + } else { + eval "require Term::Rendezvous;" or die $@; + my $rv = $ENV{PERLDB_NOTTY} || "/tmp/perldbtty$$"; + my $term_rv = new Term::Rendezvous $rv; + $IN = $term_rv->IN; + $OUT = $term_rv->OUT; + } + } + if (!$rl) { + $term = new Term::ReadLine::Stub 'perldb', $IN, $OUT; + } else { + $term = new Term::ReadLine 'perldb', $IN, $OUT; + + $rl_attribs = $term->Attribs; + $rl_attribs->{basic_word_break_characters} .= '-:+/*,[])}' + if defined $rl_attribs->{basic_word_break_characters} + and index($rl_attribs->{basic_word_break_characters}, ":") == -1; + $rl_attribs->{special_prefixes} = '$@&%'; + $rl_attribs->{completer_word_break_characters} .= '$@&%'; + $rl_attribs->{completion_function} = \&db_complete; + } + $LINEINFO = $OUT unless defined $LINEINFO; + $lineinfo = $console unless defined $lineinfo; + $term->MinLine(2); + if ($term->Features->{setHistory} and "@hist" ne "?") { + $term->SetHistory(@hist); + } + ornaments($ornaments) if defined $ornaments; + $term_pid = $$; +} + +sub resetterm { # We forked, so we need a different TTY + $term_pid = $$; + if (defined &get_fork_TTY) { + &get_fork_TTY; + } elsif (not defined $fork_TTY + and defined $ENV{TERM} and $ENV{TERM} eq 'xterm' + and defined $ENV{WINDOWID} and defined $ENV{DISPLAY}) { + # Possibly _inside_ XTERM + open XT, q[3>&1 xterm -title 'Forked Perl debugger' -e sh -c 'tty 1>&3;\ + sleep 10000000' |]; + $fork_TTY = <XT>; + chomp $fork_TTY; + } + if (defined $fork_TTY) { + TTY($fork_TTY); + undef $fork_TTY; + } else { + print_help(<<EOP); +I<#########> Forked, but do not know how to change a B<TTY>. I<#########> + Define B<\$DB::fork_TTY> + - or a function B<DB::get_fork_TTY()> which will set B<\$DB::fork_TTY>. + The value of B<\$DB::fork_TTY> should be the name of I<TTY> to use. + On I<UNIX>-like systems one can get the name of a I<TTY> for the given window + by typing B<tty>, and disconnect the I<shell> from I<TTY> by B<sleep 1000000>. +EOP + } +} + +sub readline { + if (@typeahead) { + my $left = @typeahead; + my $got = shift @typeahead; + print $OUT "auto(-$left)", shift, $got, "\n"; + $term->AddHistory($got) + if length($got) > 1 and defined $term->Features->{addHistory}; + return $got; + } + local $frame = 0; + local $doret = -2; + $term->readline(@_); +} + +sub dump_option { + my ($opt, $val)= @_; + $val = option_val($opt,'N/A'); + $val =~ s/([\\\'])/\\$1/g; + printf $OUT "%20s = '%s'\n", $opt, $val; +} + +sub option_val { + my ($opt, $default)= @_; + my $val; + if (defined $optionVars{$opt} + and defined $ {$optionVars{$opt}}) { + $val = $ {$optionVars{$opt}}; + } elsif (defined $optionAction{$opt} + and defined &{$optionAction{$opt}}) { + $val = &{$optionAction{$opt}}(); + } elsif (defined $optionAction{$opt} + and not defined $option{$opt} + or defined $optionVars{$opt} + and not defined $ {$optionVars{$opt}}) { + $val = $default; + } else { + $val = $option{$opt}; + } + $val +} + +sub parse_options { + local($_)= @_; + while ($_ ne "") { + s/^(\w+)(\s*$|\W)// or print($OUT "Invalid option `$_'\n"), last; + my ($opt,$sep) = ($1,$2); + my $val; + if ("?" eq $sep) { + print($OUT "Option query `$opt?' followed by non-space `$_'\n"), last + if /^\S/; + #&dump_option($opt); + } elsif ($sep !~ /\S/) { + $val = "1"; + } elsif ($sep eq "=") { + s/^(\S*)($|\s+)//; + $val = $1; + } else { #{ to "let some poor schmuck bounce on the % key in B<vi>." + my ($end) = "\\" . substr( ")]>}$sep", index("([<{",$sep), 1 ); #} + s/^(([^\\$end]|\\[\\$end])*)$end($|\s+)// or + print($OUT "Unclosed option value `$opt$sep$_'\n"), last; + $val = $1; + $val =~ s/\\([\\$end])/$1/g; + } + my ($option); + my $matches = + grep( /^\Q$opt/ && ($option = $_), @options ); + $matches = grep( /^\Q$opt/i && ($option = $_), @options ) + unless $matches; + print $OUT "Unknown option `$opt'\n" unless $matches; + print $OUT "Ambiguous option `$opt'\n" if $matches > 1; + $option{$option} = $val if $matches == 1 and defined $val; + eval "local \$frame = 0; local \$doret = -2; + require '$optionRequire{$option}'" + if $matches == 1 and defined $optionRequire{$option} and defined $val; + $ {$optionVars{$option}} = $val + if $matches == 1 + and defined $optionVars{$option} and defined $val; + & {$optionAction{$option}} ($val) + if $matches == 1 + and defined $optionAction{$option} + and defined &{$optionAction{$option}} and defined $val; + &dump_option($option) if $matches == 1 && $OUT ne \*STDERR; # Not $rcfile + s/^\s+//; + } +} + +sub set_list { + my ($stem,@list) = @_; + my $val; + $ENV{"$ {stem}_n"} = @list; + for $i (0 .. $#list) { + $val = $list[$i]; + $val =~ s/\\/\\\\/g; + $val =~ s/([\0-\37\177\200-\377])/"\\0x" . unpack('H2',$1)/eg; + $ENV{"$ {stem}_$i"} = $val; + } +} + +sub get_list { + my $stem = shift; + my @list; + my $n = delete $ENV{"$ {stem}_n"}; + my $val; + for $i (0 .. $n - 1) { + $val = delete $ENV{"$ {stem}_$i"}; + $val =~ s/\\((\\)|0x(..))/ $2 ? $2 : pack('H2', $3) /ge; + push @list, $val; + } + @list; +} + +sub catch { + $signal = 1; + return; # Put nothing on the stack - malloc/free land! +} + +sub warn { + my($msg)= join("",@_); + $msg .= ": $!\n" unless $msg =~ /\n$/; + print $OUT $msg; +} + +sub TTY { + if (@_ and $term and $term->Features->{newTTY}) { + my ($in, $out) = shift; + if ($in =~ /,/) { + ($in, $out) = split /,/, $in, 2; + } else { + $out = $in; + } + open IN, $in or die "cannot open `$in' for read: $!"; + open OUT, ">$out" or die "cannot open `$out' for write: $!"; + $term->newTTY(\*IN, \*OUT); + $IN = \*IN; + $OUT = \*OUT; + return $tty = $in; + } elsif ($term and @_) { + &warn("Too late to set TTY, enabled on next `R'!\n"); + } + $tty = shift if @_; + $tty or $console; +} + +sub noTTY { + if ($term) { + &warn("Too late to set noTTY, enabled on next `R'!\n") if @_; + } + $notty = shift if @_; + $notty; +} + +sub ReadLine { + if ($term) { + &warn("Too late to set ReadLine, enabled on next `R'!\n") if @_; + } + $rl = shift if @_; + $rl; +} + +sub tkRunning { + if ($ {$term->Features}{tkRunning}) { + return $term->tkRunning(@_); + } else { + print $OUT "tkRunning not supported by current ReadLine package.\n"; + 0; + } +} + +sub NonStop { + if ($term) { + &warn("Too late to set up NonStop mode, enabled on next `R'!\n") if @_; + } + $runnonstop = shift if @_; + $runnonstop; +} + +sub pager { + if (@_) { + $pager = shift; + $pager="|".$pager unless $pager =~ /^(\+?\>|\|)/; + } + $pager; +} + +sub shellBang { + if (@_) { + $sh = quotemeta shift; + $sh .= "\\b" if $sh =~ /\w$/; + } + $psh = $sh; + $psh =~ s/\\b$//; + $psh =~ s/\\(.)/$1/g; + &sethelp; + $psh; +} + +sub ornaments { + if (defined $term) { + local ($warnLevel,$dieLevel) = (0, 1); + return '' unless $term->Features->{ornaments}; + eval { $term->ornaments(@_) } || ''; + } else { + $ornaments = shift; + } +} + +sub recallCommand { + if (@_) { + $rc = quotemeta shift; + $rc .= "\\b" if $rc =~ /\w$/; + } + $prc = $rc; + $prc =~ s/\\b$//; + $prc =~ s/\\(.)/$1/g; + &sethelp; + $prc; +} + +sub LineInfo { + return $lineinfo unless @_; + $lineinfo = shift; + my $stream = ($lineinfo =~ /^(\+?\>|\|)/) ? $lineinfo : ">$lineinfo"; + $emacs = ($stream =~ /^\|/); + open(LINEINFO, "$stream") || &warn("Cannot open `$stream' for write"); + $LINEINFO = \*LINEINFO; + my $save = select($LINEINFO); + $| = 1; + select($save); + $lineinfo; +} + +sub list_versions { + my %version; + my $file; + for (keys %INC) { + $file = $_; + s,\.p[lm]$,,i ; + s,/,::,g ; + s/^perl5db$/DB/; + s/^Term::ReadLine::readline$/readline/; + if (defined $ { $_ . '::VERSION' }) { + $version{$file} = "$ { $_ . '::VERSION' } from "; + } + $version{$file} .= $INC{$file}; + } + do 'dumpvar.pl' unless defined &main::dumpValue; + if (defined &main::dumpValue) { + local $frame = 0; + &main::dumpValue(\%version); + } else { + print $OUT "dumpvar.pl not available.\n"; + } +} + +sub sethelp { + $help = " +B<T> Stack trace. +B<s> [I<expr>] Single step [in I<expr>]. +B<n> [I<expr>] Next, steps over subroutine calls [in I<expr>]. +<B<CR>> Repeat last B<n> or B<s> command. +B<r> Return from current subroutine. +B<c> [I<line>|I<sub>] Continue; optionally inserts a one-time-only breakpoint + at the specified position. +B<l> I<min>B<+>I<incr> List I<incr>+1 lines starting at I<min>. +B<l> I<min>B<->I<max> List lines I<min> through I<max>. +B<l> I<line> List single I<line>. +B<l> I<subname> List first window of lines from subroutine. +B<l> List next window of lines. +B<-> List previous window of lines. +B<w> [I<line>] List window around I<line>. +B<.> Return to the executed line. +B<f> I<filename> Switch to viewing I<filename>. Must be loaded. +B</>I<pattern>B</> Search forwards for I<pattern>; final B</> is optional. +B<?>I<pattern>B<?> Search backwards for I<pattern>; final B<?> is optional. +B<L> List all breakpoints and actions. +B<S> [[B<!>]I<pattern>] List subroutine names [not] matching I<pattern>. +B<t> Toggle trace mode. +B<t> I<expr> Trace through execution of I<expr>. +B<b> [I<line>] [I<condition>] + Set breakpoint; I<line> defaults to the current execution line; + I<condition> breaks if it evaluates to true, defaults to '1'. +B<b> I<subname> [I<condition>] + Set breakpoint at first line of subroutine. +B<b> B<load> I<filename> Set breakpoint on `require'ing the given file. +B<b> B<postpone> I<subname> [I<condition>] + Set breakpoint at first line of subroutine after + it is compiled. +B<b> B<compile> I<subname> + Stop after the subroutine is compiled. +B<d> [I<line>] Delete the breakpoint for I<line>. +B<D> Delete all breakpoints. +B<a> [I<line>] I<command> + Set an action to be done before the I<line> is executed. + Sequence is: check for breakpoint/watchpoint, print line + if necessary, do action, prompt user if necessary, + execute expression. +B<A> Delete all actions. +B<W> I<expr> Add a global watch-expression. +B<W> Delete all watch-expressions. +B<V> [I<pkg> [I<vars>]] List some (default all) variables in package (default current). + Use B<~>I<pattern> and B<!>I<pattern> for positive and negative regexps. +B<X> [I<vars>] Same as \"B<V> I<currentpackage> [I<vars>]\". +B<x> I<expr> Evals expression in array context, dumps the result. +B<m> I<expr> Evals expression in array context, prints methods callable + on the first element of the result. +B<m> I<class> Prints methods callable via the given class. +B<O> [I<opt>[B<=>I<val>]] [I<opt>B<\">I<val>B<\">] [I<opt>B<?>]... + Set or query values of options. I<val> defaults to 1. I<opt> can + be abbreviated. Several options can be listed. + I<recallCommand>, I<ShellBang>: chars used to recall command or spawn shell; + I<pager>: program for output of \"|cmd\"; + I<tkRunning>: run Tk while prompting (with ReadLine); + I<signalLevel> I<warnLevel> I<dieLevel>: level of verbosity; + I<inhibit_exit> Allows stepping off the end of the script. + I<ImmediateStop> Debugger should stop as early as possible. + The following options affect what happens with B<V>, B<X>, and B<x> commands: + I<arrayDepth>, I<hashDepth>: print only first N elements ('' for all); + I<compactDump>, I<veryCompact>: change style of array and hash dump; + I<globPrint>: whether to print contents of globs; + I<DumpDBFiles>: dump arrays holding debugged files; + I<DumpPackages>: dump symbol tables of packages; + I<DumpReused>: dump contents of \"reused\" addresses; + I<quote>, I<HighBit>, I<undefPrint>: change style of string dump; + I<bareStringify>: Do not print the overload-stringified value; + Option I<PrintRet> affects printing of return value after B<r> command, + I<frame> affects printing messages on entry and exit from subroutines. + I<AutoTrace> affects printing messages on every possible breaking point. + I<maxTraceLen> gives maximal length of evals/args listed in stack trace. + I<ornaments> affects screen appearance of the command line. + During startup options are initialized from \$ENV{PERLDB_OPTS}. + You can put additional initialization options I<TTY>, I<noTTY>, + I<ReadLine>, and I<NonStop> there (or use `B<R>' after you set them). +B<<> I<expr> Define Perl command to run before each prompt. +B<<<> I<expr> Add to the list of Perl commands to run before each prompt. +B<>> I<expr> Define Perl command to run after each prompt. +B<>>B<>> I<expr> Add to the list of Perl commands to run after each prompt. +B<{> I<db_command> Define debugger command to run before each prompt. +B<{{> I<db_command> Add to the list of debugger commands to run before each prompt. +B<$prc> I<number> Redo a previous command (default previous command). +B<$prc> I<-number> Redo number'th-to-last command. +B<$prc> I<pattern> Redo last command that started with I<pattern>. + See 'B<O> I<recallCommand>' too. +B<$psh$psh> I<cmd> Run cmd in a subprocess (reads from DB::IN, writes to DB::OUT)" + . ( $rc eq $sh ? "" : " +B<$psh> [I<cmd>] Run I<cmd> in subshell (forces \"\$SHELL -c 'cmd'\")." ) . " + See 'B<O> I<shellBang>' too. +B<H> I<-number> Display last number commands (default all). +B<p> I<expr> Same as \"I<print {DB::OUT} expr>\" in current package. +B<|>I<dbcmd> Run debugger command, piping DB::OUT to current pager. +B<||>I<dbcmd> Same as B<|>I<dbcmd> but DB::OUT is temporarilly select()ed as well. +B<\=> [I<alias> I<value>] Define a command alias, or list current aliases. +I<command> Execute as a perl statement in current package. +B<v> Show versions of loaded modules. +B<R> Pure-man-restart of debugger, some of debugger state + and command-line options may be lost. + Currently the following setting are preserved: + history, breakpoints and actions, debugger B<O>ptions + and the following command-line options: I<-w>, I<-I>, I<-e>. +B<h> [I<db_command>] Get help [on a specific debugger command], enter B<|h> to page. +B<h h> Summary of debugger commands. +B<q> or B<^D> Quit. Set B<\$DB::finished = 0> to debug global destruction. + +"; + $summary = <<"END_SUM"; +I<List/search source lines:> I<Control script execution:> + B<l> [I<ln>|I<sub>] List source code B<T> Stack trace + B<-> or B<.> List previous/current line B<s> [I<expr>] Single step [in expr] + B<w> [I<line>] List around line B<n> [I<expr>] Next, steps over subs + B<f> I<filename> View source in file <B<CR>> Repeat last B<n> or B<s> + B</>I<pattern>B</> B<?>I<patt>B<?> Search forw/backw B<r> Return from subroutine + B<v> Show versions of modules B<c> [I<ln>|I<sub>] Continue until position +I<Debugger controls:> B<L> List break/watch/actions + B<O> [...] Set debugger options B<t> [I<expr>] Toggle trace [trace expr] + B<<>[B<<>] or B<{>[B<{>] [I<cmd>] Do before prompt B<b> [I<ln>|I<event>] [I<cnd>] Set breakpoint + B<>>[B<>>] [I<cmd>] Do after prompt B<b> I<sub> [I<cnd>] Set breakpoint for sub + B<$prc> [I<N>|I<pat>] Redo a previous command B<d> [I<ln>] or B<D> Delete a/all breakpoints + B<H> [I<-num>] Display last num commands B<a> [I<ln>] I<cmd> Do cmd before line + B<=> [I<a> I<val>] Define/list an alias B<W> I<expr> Add a watch expression + B<h> [I<db_cmd>] Get help on command B<A> or B<W> Delete all actions/watch + B<|>[B<|>]I<dbcmd> Send output to pager B<$psh>\[B<$psh>\] I<syscmd> Run cmd in a subprocess + B<q> or B<^D> Quit B<R> Attempt a restart +I<Data Examination:> B<expr> Execute perl code, also see: B<s>,B<n>,B<t> I<expr> + B<x>|B<m> I<expr> Evals expr in array context, dumps the result or lists methods. + B<p> I<expr> Print expression (uses script's current package). + B<S> [[B<!>]I<pat>] List subroutine names [not] matching pattern + B<V> [I<Pk> [I<Vars>]] List Variables in Package. Vars can be ~pattern or !pattern. + B<X> [I<Vars>] Same as \"B<V> I<current_package> [I<Vars>]\". +END_SUM + # ')}}; # Fix balance of Emacs parsing +} + +sub print_help { + my $message = shift; + if (@Term::ReadLine::TermCap::rl_term_set) { + $message =~ s/B<([^>]+|>)>/$Term::ReadLine::TermCap::rl_term_set[2]$1$Term::ReadLine::TermCap::rl_term_set[3]/g; + $message =~ s/I<([^>]+|>)>/$Term::ReadLine::TermCap::rl_term_set[0]$1$Term::ReadLine::TermCap::rl_term_set[1]/g; + } + print $OUT $message; +} + +sub diesignal { + local $frame = 0; + local $doret = -2; + $SIG{'ABRT'} = 'DEFAULT'; + kill 'ABRT', $$ if $panic++; + if (defined &Carp::longmess) { + local $SIG{__WARN__} = ''; + local $Carp::CarpLevel = 2; # mydie + confess + &warn(Carp::longmess("Signal @_")); + } + else { + print $DB::OUT "Got signal @_\n"; + } + kill 'ABRT', $$; +} + +sub dbwarn { + local $frame = 0; + local $doret = -2; + local $SIG{__WARN__} = ''; + local $SIG{__DIE__} = ''; + eval { require Carp } if defined $^S; # If error/warning during compilation, + # require may be broken. + warn(@_, "\nCannot print stack trace, load with -MCarp option to see stack"), + return unless defined &Carp::longmess; + my ($mysingle,$mytrace) = ($single,$trace); + $single = 0; $trace = 0; + my $mess = Carp::longmess(@_); + ($single,$trace) = ($mysingle,$mytrace); + &warn($mess); +} + +sub dbdie { + local $frame = 0; + local $doret = -2; + local $SIG{__DIE__} = ''; + local $SIG{__WARN__} = ''; + my $i = 0; my $ineval = 0; my $sub; + if ($dieLevel > 2) { + local $SIG{__WARN__} = \&dbwarn; + &warn(@_); # Yell no matter what + return; + } + if ($dieLevel < 2) { + die @_ if $^S; # in eval propagate + } + eval { require Carp } if defined $^S; # If error/warning during compilation, + # require may be broken. + die(@_, "\nCannot print stack trace, load with -MCarp option to see stack") + unless defined &Carp::longmess; + # We do not want to debug this chunk (automatic disabling works + # inside DB::DB, but not in Carp). + my ($mysingle,$mytrace) = ($single,$trace); + $single = 0; $trace = 0; + my $mess = Carp::longmess(@_); + ($single,$trace) = ($mysingle,$mytrace); + die $mess; +} + +sub warnLevel { + if (@_) { + $prevwarn = $SIG{__WARN__} unless $warnLevel; + $warnLevel = shift; + if ($warnLevel) { + $SIG{__WARN__} = \&DB::dbwarn; + } else { + $SIG{__WARN__} = $prevwarn; + } + } + $warnLevel; +} + +sub dieLevel { + if (@_) { + $prevdie = $SIG{__DIE__} unless $dieLevel; + $dieLevel = shift; + if ($dieLevel) { + $SIG{__DIE__} = \&DB::dbdie; # if $dieLevel < 2; + #$SIG{__DIE__} = \&DB::diehard if $dieLevel >= 2; + print $OUT "Stack dump during die enabled", + ( $dieLevel == 1 ? " outside of evals" : ""), ".\n" + if $I_m_init; + print $OUT "Dump printed too.\n" if $dieLevel > 2; + } else { + $SIG{__DIE__} = $prevdie; + print $OUT "Default die handler restored.\n"; + } + } + $dieLevel; +} + +sub signalLevel { + if (@_) { + $prevsegv = $SIG{SEGV} unless $signalLevel; + $prevbus = $SIG{BUS} unless $signalLevel; + $signalLevel = shift; + if ($signalLevel) { + $SIG{SEGV} = \&DB::diesignal; + $SIG{BUS} = \&DB::diesignal; + } else { + $SIG{SEGV} = $prevsegv; + $SIG{BUS} = $prevbus; + } + } + $signalLevel; +} + +sub find_sub { + my $subr = shift; + return unless defined &$subr; + $sub{$subr} or do { + $subr = \&$subr; # Hard reference + my $s; + for (keys %sub) { + $s = $_, last if $subr eq \&$_; + } + $sub{$s} if $s; + } +} + +sub methods { + my $class = shift; + $class = ref $class if ref $class; + local %seen; + local %packs; + methods_via($class, '', 1); + methods_via('UNIVERSAL', 'UNIVERSAL', 0); +} + +sub methods_via { + my $class = shift; + return if $packs{$class}++; + my $prefix = shift; + my $prepend = $prefix ? "via $prefix: " : ''; + my $name; + for $name (grep {defined &{$ {"$ {class}::"}{$_}}} + sort keys %{"$ {class}::"}) { + next if $seen{ $name }++; + print $DB::OUT "$prepend$name\n"; + } + return unless shift; # Recurse? + for $name (@{"$ {class}::ISA"}) { + $prepend = $prefix ? $prefix . " -> $name" : $name; + methods_via($name, $prepend, 1); + } +} + +# The following BEGIN is very handy if debugger goes havoc, debugging debugger? + +BEGIN { # This does not compile, alas. + $IN = \*STDIN; # For bugs before DB::OUT has been opened + $OUT = \*STDERR; # For errors before DB::OUT has been opened + $sh = '!'; + $rc = ','; + @hist = ('?'); + $deep = 100; # warning if stack gets this deep + $window = 10; + $preview = 3; + $sub = ''; + $SIG{INT} = \&DB::catch; + # This may be enabled to debug debugger: + #$warnLevel = 1 unless defined $warnLevel; + #$dieLevel = 1 unless defined $dieLevel; + #$signalLevel = 1 unless defined $signalLevel; + + $db_stop = 0; # Compiler warning + $db_stop = 1 << 30; + $level = 0; # Level of recursive debugging + # @stack and $doret are needed in sub sub, which is called for DB::postponed. + # Triggers bug (?) in perl is we postpone this until runtime: + @postponed = @stack = (0); + $doret = -2; + $frame = 0; +} + +BEGIN {$^W = $ini_warn;} # Switch warnings back + +#use Carp; # This did break, left for debuggin + +sub db_complete { + # Specific code for b c l V m f O, &blah, $blah, @blah, %blah + my($text, $line, $start) = @_; + my ($itext, $search, $prefix, $pack) = + ($text, "^\Q$ {'package'}::\E([^:]+)\$"); + + return sort grep /^\Q$text/, (keys %sub), qw(postpone load compile), # subroutines + (map { /$search/ ? ($1) : () } keys %sub) + if (substr $line, 0, $start) =~ /^\|*[blc]\s+((postpone|compile)\s+)?$/; + return sort grep /^\Q$text/, values %INC # files + if (substr $line, 0, $start) =~ /^\|*b\s+load\s+$/; + return sort map {($_, db_complete($_ . "::", "V ", 2))} + grep /^\Q$text/, map { /^(.*)::$/ ? ($1) : ()} keys %:: # top-packages + if (substr $line, 0, $start) =~ /^\|*[Vm]\s+$/ and $text =~ /^\w*$/; + return sort map {($_, db_complete($_ . "::", "V ", 2))} + grep !/^main::/, + grep /^\Q$text/, map { /^(.*)::$/ ? ($prefix . "::$1") : ()} keys %{$prefix . '::'} + # packages + if (substr $line, 0, $start) =~ /^\|*[Vm]\s+$/ + and $text =~ /^(.*[^:])::?(\w*)$/ and $prefix = $1; + if ( $line =~ /^\|*f\s+(.*)/ ) { # Loaded files + # We may want to complete to (eval 9), so $text may be wrong + $prefix = length($1) - length($text); + $text = $1; + return sort + map {substr $_, 2 + $prefix} grep /^_<\Q$text/, (keys %main::), $0 + } + if ((substr $text, 0, 1) eq '&') { # subroutines + $text = substr $text, 1; + $prefix = "&"; + return sort map "$prefix$_", + grep /^\Q$text/, + (keys %sub), + (map { /$search/ ? ($1) : () } + keys %sub); + } + if ($text =~ /^[\$@%](.*)::(.*)/) { # symbols in a package + $pack = ($1 eq 'main' ? '' : $1) . '::'; + $prefix = (substr $text, 0, 1) . $1 . '::'; + $text = $2; + my @out + = map "$prefix$_", grep /^\Q$text/, grep /^_?[a-zA-Z]/, keys %$pack ; + if (@out == 1 and $out[0] =~ /::$/ and $out[0] ne $itext) { + return db_complete($out[0], $line, $start); + } + return sort @out; + } + if ($text =~ /^[\$@%]/) { # symbols (in $package + packages in main) + $pack = ($package eq 'main' ? '' : $package) . '::'; + $prefix = substr $text, 0, 1; + $text = substr $text, 1; + my @out = map "$prefix$_", grep /^\Q$text/, + (grep /^_?[a-zA-Z]/, keys %$pack), + ( $pack eq '::' ? () : (grep /::$/, keys %::) ) ; + if (@out == 1 and $out[0] =~ /::$/ and $out[0] ne $itext) { + return db_complete($out[0], $line, $start); + } + return sort @out; + } + if ((substr $line, 0, $start) =~ /^\|*O\b.*\s$/) { # Options after a space + my @out = grep /^\Q$text/, @options; + my $val = option_val($out[0], undef); + my $out = '? '; + if (not defined $val or $val =~ /[\n\r]/) { + # Can do nothing better + } elsif ($val =~ /\s/) { + my $found; + foreach $l (split //, qq/\"\'\#\|/) { + $out = "$l$val$l ", last if (index $val, $l) == -1; + } + } else { + $out = "=$val "; + } + # Default to value if one completion, to question if many + $rl_attribs->{completer_terminator_character} = (@out == 1 ? $out : '? '); + return sort @out; + } + return $term->filename_list($text); # filenames +} + +sub end_report { + print $OUT "Use `q' to quit or `R' to restart. `h q' for details.\n" +} + +END { + $finished = $inhibit_exit; # So that some keys may be disabled. + # Do not stop in at_exit() and destructors on exit: + $DB::single = !$exiting && !$runnonstop; + DB::fake::at_exit() unless $exiting or $runnonstop; +} + +package DB::fake; + +sub at_exit { + "Debugged program terminated. Use `q' to quit or `R' to restart."; +} + +package DB; # Do not trace this 1; below! + +1; |
