From: Perl 5 Porters Date: Thu, 11 Jan 1996 22:23:31 +0000 (+0000) Subject: Ilya's new debugger. X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=d338d6fe1dfdfdbc07c2d6d7a2a4ae7db5887d93;p=p5sagit%2Fp5-mst-13.2.git Ilya's new debugger. --- diff --git a/lib/dumpvar.pl b/lib/dumpvar.pl index 4ebcb52..c78319b 100644 --- a/lib/dumpvar.pl +++ b/lib/dumpvar.pl @@ -1,3 +1,376 @@ +require 5.002; # For (defined ref) +package dumpvar; + +# Needed for PrettyPrinter only: + +# require 5.001; # Well, it coredumps anyway undef DB in 5.000 (not now) + +# translate control chars to ^X - Randal Schwartz +# Modifications to print types by Peter Gordon v1.0 + +# Ilya Zakharevich -- patches after 5.001 (and some before ;-) + +# Won't dump symbol tables and contents of debugged files by default + +$winsize = 80 unless defined $winsize; + + +# Defaults + +# $globPrint = 1; +$printUndef = 1 unless defined $printUndef; +$tick = "'" unless defined $tick; +$unctrl = 'quote' unless defined $unctrl; + +sub main::dumpValue { + local %address; + (print "undef\n"), return unless defined $_[0]; + (print &stringify($_[0]), "\n"), return unless ref $_[0]; + dumpvar::unwrap($_[0],0); +} + +# This one is good for variable names: + +sub unctrl { + local($_) = @_; + local($v) ; + + return \$_ if ref \$_ eq "GLOB"; + s/([\001-\037\177])/'^'.pack('c',ord($1)^64)/eg; + $_; +} + +sub stringify { + local($_,$noticks) = @_; + local($v) ; + + return 'undef' unless defined $_ or not $printUndef; + return $_ . "" if ref \$_ eq 'GLOB'; + if ($tick eq "'") { + s/([\'\\])/\\$1/g; + } elsif ($unctrl eq 'unctrl') { + s/([\"\\])/\\$1/g ; + s/([\000-\037\177])/'^'.pack('c',ord($1)^64)/eg; + s/([\200-\377])/'\\0x'.sprintf('%2X',ord($1))/eg + if $quoteHighBit; + } elsif ($unctrl eq 'quote') { + s/([\"\\\$\@])/\\$1/g if $tick eq '"'; + s/\033/\\e/g; + s/([\000-\037\177])/'\\c'.chr(ord($1)^64)/eg; + } + s/([\200-\377])/'\\'.sprintf('%3o',ord($1))/eg if $quoteHighBit; + ($noticks || /^\d+(\.\d*)?\Z/) + ? $_ + : $tick . $_ . $tick; +} + +sub ShortArray { + my $tArrayDepth = $#{$_[0]} ; + $tArrayDepth = $#{$_[0]} < $arrayDepth-1 ? $#{$_[0]} : $arrayDepth-1 + unless $arrayDepth eq '' ; + my $shortmore = ""; + $shortmore = " ..." if $tArrayDepth < $#{$_[0]} ; + if (!grep(ref $_, @{$_[0]})) { + $short = "0..$#{$_[0]} '" . + join("' '", @{$_[0]}[0..$tArrayDepth]) . "'$shortmore"; + return $short if length $short <= $compactDump; + } + undef; +} + +sub DumpElem { + my $short = &stringify($_[0], ref $_[0]); + if ($veryCompact && ref $_[0] + && (ref $_[0] eq 'ARRAY' and !grep(ref $_, @{$_[0]}) )) { + my $end = "0..$#{$v} '" . + join("' '", @{$_[0]}[0..$tArrayDepth]) . "'$shortmore"; + } elsif ($veryCompact && ref $_[0] + && (ref $_[0] eq 'HASH') and !grep(ref $_, values %{$_[0]})) { + my $end = 1; + $short = $sp . "0..$#{$v} '" . + join("' '", @{$v}[0..$tArrayDepth]) . "'$shortmore"; + } else { + print "$short\n"; + unwrap($_[0],$_[1]); + } +} + +sub unwrap { + return if $DB::signal; + local($v) = shift ; + local($s) = shift ; # extra no of spaces + local(%v,@v,$sp,$value,$key,$type,@sortKeys,$more,$shortmore,$short) ; + local($tHashDepth,$tArrayDepth) ; + + $sp = " " x $s ; + $s += 3 ; + + # Check for reused addresses + if (ref $v) { + ($address) = $v =~ /(0x[0-9a-f]+)/ ; + if (defined $address) { + ($type) = $v =~ /=(.*?)\(/ ; + $address{$address}++ ; + if ( $address{$address} > 1 ) { + print "${sp}-> REUSED_ADDRESS\n" ; + return ; + } + } + } elsif (ref \$v eq 'GLOB') { + $address = "$v" . ""; # To avoid a bug with globs + $address{$address}++ ; + if ( $address{$address} > 1 ) { + print "${sp}*DUMPED_GLOB*\n" ; + return ; + } + } + + if ( ref $v eq 'HASH' or $type eq 'HASH') { + @sortKeys = sort keys(%$v) ; + undef $more ; + $tHashDepth = $#sortKeys ; + $tHashDepth = $#sortKeys < $hashDepth-1 ? $#sortKeys : $hashDepth-1 + unless $hashDepth eq '' ; + $more = "....\n" if $tHashDepth < $#sortKeys ; + $shortmore = ""; + $shortmore = ", ..." if $tHashDepth < $#sortKeys ; + $#sortKeys = $tHashDepth ; + if ($compactDump && !grep(ref $_, values %{$v})) { + #$short = $sp . + # (join ', ', +# Next row core dumps during require from DB on 5.000, even with map {"_"} + # map {&stringify($_) . " => " . &stringify($v->{$_})} + # @sortKeys) . "'$shortmore"; + $short = $sp; + my @keys; + for (@sortKeys) { + push @keys, &stringify($_) . " => " . &stringify($v->{$_}); + } + $short .= join ', ', @keys; + $short .= $shortmore; + (print "$short\n"), return if length $short <= $compactDump; + } + for $key (@sortKeys) { + return if $DB::signal; + $value = $ {$v}{$key} ; + print "$sp", &stringify($key), " => "; + DumpElem $value, $s; + } + print "$sp empty hash\n" unless @sortKeys; + print "$sp$more" if defined $more ; + } elsif ( ref $v eq 'ARRAY' or $type eq 'ARRAY') { + $tArrayDepth = $#{$v} ; + undef $more ; + $tArrayDepth = $#{$v} < $arrayDepth-1 ? $#{$v} : $arrayDepth-1 + unless $arrayDepth eq '' ; + $more = "....\n" if $tArrayDepth < $#{$v} ; + $shortmore = ""; + $shortmore = " ..." if $tArrayDepth < $#{$v} ; + if ($compactDump && !grep(ref $_, @{$v})) { + if ($#$v >= 0) { + $short = $sp . "0..$#{$v} '" . + join("' '", @{$v}[0..$tArrayDepth]) . "'$shortmore"; + } else { + $short = $sp . "empty array"; + } + (print "$short\n"), return if length $short <= $compactDump; + } + #if ($compactDump && $short = ShortArray($v)) { + # print "$short\n"; + # return; + #} + for $num ($[ .. $tArrayDepth) { + return if $DB::signal; + print "$sp$num "; + DumpElem $v->[$num], $s; + } + print "$sp empty array\n" unless @$v; + print "$sp$more" if defined $more ; + } elsif ( ref $v eq 'SCALAR' or ref $v eq 'REF' or $type eq 'SCALAR' ) { + print "$sp-> "; + DumpElem $$v, $s; + } elsif (ref $v eq 'GLOB') { + print "$sp-> ",&stringify($$v,1),"\n"; + if ($globPrint) { + $s += 3; + dumpglob($s, "{$$v}", $$v, 1); + } elsif (defined ($fileno = fileno($v))) { + print( (' ' x ($s+3)) . "FileHandle({$$v}) => fileno($fileno)\n" ); + } + } elsif (ref \$v eq 'GLOB') { + if ($globPrint) { + dumpglob($s, "{$v}", $v, 1) if $globPrint; + } elsif (defined ($fileno = fileno(\$v))) { + print( (' ' x $s) . "FileHandle({$v}) => fileno($fileno)\n" ); + } + } +} + +sub matchvar { + $_[0] eq $_[1] or + ($_[1] =~ /^([!~])(.)/) and + ($1 eq '!') ^ (eval {($_[2] . "::" . $_[0]) =~ /$2$'/}); +} + +sub compactDump { + $compactDump = shift if @_; + $compactDump = 6*80-1 if $compactDump and $compactDump < 2; + $compactDump; +} + +sub veryCompact { + $veryCompact = shift if @_; + compactDump(1) if !$compactDump and $veryCompact; + $veryCompact; +} + +sub unctrlSet { + if (@_) { + my $in = shift; + if ($in eq 'unctrl' or $in eq 'quote') { + $unctrl = $in; + } else { + print "Unknown value for `unctrl'.\n"; + } + } + $unctrl; +} + +sub quote { + if (@_ and $_[0] eq '"') { + $tick = '"'; + $unctrl = 'quote'; + } elsif (@_) { # Need to set + $tick = "'"; + $unctrl = 'unctrl'; + } + $tick; +} + +sub dumpglob { + return if $DB::signal; + my ($off,$key, $val, $all) = @_; + local(*entry) = $val; + my $fileno; + if (defined $entry) { + print( (' ' x $off) . "\$", &unctrl($key), " = " ); + DumpElem $entry, 3+$off; + } + if (($key !~ /^_ fileno($fileno)\n" ); + } + if ($all) { + if (defined &entry) { + my $sub = $key; + $sub = $1 if $sub =~ /^\{\*(.*)\}$/; + my $place = $DB::sub{$sub}; + $place = '???' unless defined $place; + print( (' ' x $off) . "&$sub in $place\n" ); + } + } +} + +sub main::dumpvar { + my ($package,@vars) = @_; + local(%address,$key,$val); + $package .= "::" unless $package =~ /::$/; + *stab = *{"main::"}; + while ($package =~ /(\w+?::)/g){ + *stab = $ {stab}{$1}; + } + local $TotalStrings = 0; + local $Strings = 0; + local $CompleteTotal = 0; + while (($key,$val) = each(%stab)) { + return if $DB::signal; + next if @vars && !grep( matchvar($key, $_), @vars ); + if ($usageOnly) { + globUsage(\$val, $key) unless $package eq 'dumpvar' and $key eq 'stab'; + } else { + dumpglob(0,$key, $val); + } + } + if ($usageOnly) { + print "String space: $TotalStrings bytes in $Strings strings.\n"; + $CompleteTotal += $TotalStrings; + print "Grand total = $CompleteTotal bytes (1 level deep) + overhead.\n"; + } +} + +sub scalarUsage { + my $size = length($_[0]); + $TotalStrings += $size; + $Strings++; + $size; +} + +sub arrayUsage { # array ref, name + my $size = 0; + map {$size += scalarUsage($_)} @{$_[0]}; + my $len = @{$_[0]}; + print "\@$_[1] = $len item", ($len > 1 ? "s" : ""), + " (data: $size bytes)\n" + if defined $_[1]; + $CompleteTotal += $size; + $size; +} + +sub hashUsage { # hash ref, name + my @keys = keys %{$_[0]}; + my @values = values %{$_[0]}; + my $keys = arrayUsage \@keys; + my $values = arrayUsage \@values; + my $len = @keys; + my $total = $keys + $values; + print "\%$_[1] = $len item", ($len > 1 ? "s" : ""), + " (keys: $keys; values: $values; total: $total bytes)\n" + if defined $_[1]; + $total; +} + +sub globUsage { # glob ref, name + local *name = *{$_[0]}; + $total = 0; + $total += scalarUsage $name if defined $name; + $total += arrayUsage \@name, $_[1] if defined @name; + $total += hashUsage \%name, $_[1] if defined %name and $_[1] ne "main::" + and $_[1] ne "DB::"; #and !($package eq "dumpvar" and $key eq "stab")); + $total; +} + +sub packageUsage { + my ($package,@vars) = @_; + $package .= "::" unless $package =~ /::$/; + local *stab = *{"main::"}; + while ($package =~ /(\w+?::)/g){ + *stab = $ {stab}{$1}; + } + local $TotalStrings = 0; + local $CompleteTotal = 0; + my ($key,$val); + while (($key,$val) = each(%stab)) { + next if @vars && !grep($key eq $_,@vars); + globUsage \$val, $key unless $package eq 'dumpvar' and $key eq 'stab'; + } + print "String space: $TotalStrings.\n"; + $CompleteTotal += $TotalStrings; + print "\nGrand total = $CompleteTotal bytes\n"; +} + +1; + package dumpvar; # translate control chars to ^X - Randal Schwartz diff --git a/lib/perl5db.pl b/lib/perl5db.pl index 15a2498..f6e8eca 100644 --- a/lib/perl5db.pl +++ b/lib/perl5db.pl @@ -1,5 +1,1300 @@ package DB; +# Debugger for Perl 5.001m; perl5db.pl patch level: + +$header = 'perl5db.pl patch level 0.93'; + +# 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 @line and %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. +# +# Note that no subroutine call is possible until &DB::sub is defined +# (for subroutines defined outside this file). 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 { $trace = 1; } +# +# The script will run without human intervention, putting trace +# information into db.out. (If you interrupt it, you would better +# reset LineInfo to something "interactive"!) +# + + +local($^W) = 0; +warn ( # Do not ;-) + $dumpvar::hashDepth, + $dumpvar::arrayDepth, + $dumpvar::dumpDBFiles, + $dumpvar::dumpPackages, + $dumpvar::quoteHighBit, + $dumpvar::printUndef, + $dumpvar::globPrint, + $readline::Tk_toloop, + $dumpvar::usageOnly, + @ARGS, + $Carp::CarpLevel, + ) if 0; + +# $prevwarn = $prevdie = $prevbus = $prevsegv = ''; # Does not help?! + +$trace = $signal = $single = 0; # Uninitialized warning suppression + # (local $^W cannot help - other packages!). +@stack = (0); + +$option{PrintRet} = 1; + +@options = qw(hashDepth arrayDepth DumpDBFiles DumpPackages + compactDump veryCompact quote HighBit undefPrint + globPrint PrintRet UsageOnly frame + TTY noTTY ReadLine NonStop LineInfo + recallCommand ShellBang pager tkRunning + signalLevel warnLevel dieLevel); + +%optionVars = ( + hashDepth => \$dumpvar::hashDepth, + arrayDepth => \$dumpvar::arrayDepth, + DumpDBFiles => \$dumpvar::dumpDBFiles, + DumpPackages => \$dumpvar::dumpPackages, + HighBit => \$dumpvar::quoteHighBit, + undefPrint => \$dumpvar::printUndef, + globPrint => \$dumpvar::globPrint, + tkRunning => \$readline::Tk_toloop, + UsageOnly => \$dumpvar::usageOnly, + frame => \$frame, +); + +%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, + ); + +%optionRequire = ( + compactDump => 'dumpvar.pl', + veryCompact => 'dumpvar.pl', + quote => 'dumpvar.pl', + ); + +# These guys may be defined in $ENV{PERL5DB} : +$rl = 1 unless defined $rl; +warnLevel($warnLevel); +dieLevel($dieLevel); +signalLevel($signalLevel); +&pager(defined($ENV{PAGER}) ? $ENV{PAGER} : "|more") unless defined $pager; +&recallCommand("!") unless defined $prc; +&shellBang("!") unless defined $psh; + +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 ($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 (-e "con") { + $console = "con"; + } else { + $console = "sys\$command"; + } + + # Around a bug: + if (defined $ENV{OS2_SHELL} and $emacs) { # 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 $rcfile + &afterinit(); +} + +############################################################ Subroutines + +# The following code may be executed now, but gives FPE later: +# BEGIN {warn 5} + +sub DB { + if ($runnonstop) { # Disable until signal + for ($i=0; $i <= $#stack; ) { + $stack[$i++] &= ~1; + } + $single = $runnonstop = 0; # Once only + return; + } + &save; + if ($doret) { + $doret = 0; + if ($option{PrintRet}) { + print $OUT "$retctx context return from $lastsub:", + ($retctx eq 'list') ? "\n" : " " ; + dumpit( ($retctx eq 'list') ? \@ret : $ret ); + } + } + ($package, $filename, $line) = caller; + $usercontext = '($@, $!, $,, $/, $\, $^W) = @saved;' . + "package $package;"; # this won't let them modify, alas + local(*dbline) = "::_<$filename"; + $max = $#dbline; + if (($stop,$action) = split(/\0/,$dbline{$line})) { + if ($stop eq '1') { + $signal |= 1; + } else { + $evalarg = "\$DB::signal |= do {$stop;}"; &eval; + $dbline{$line} =~ s/;9($|\0)/$1/; + } + } + if ($single || $trace || $signal) { + $term || &setterm; + if ($emacs) { + print $LINEINFO "\032\032$filename:$line:0\n"; + } else { + $sub =~ s/\'/::/; + $prefix = $sub =~ /::/ ? "" : "${'package'}::"; + $prefix .= "$sub($filename:"; + $after = ($dbline[$line] =~ /\n$/ ? '' : "\n"); + if (length($prefix) > 30) { + print $LINEINFO "$prefix$line):\n$line:\t", $dbline[$line], $after; + $prefix = ""; + $infix = ":\t"; + } else { + $infix = "):\t"; + print $LINEINFO "$prefix$line$infix",$dbline[$line], $after; + } + for ($i = $line + 1; $i <= $max && $dbline[$i] == 0; ++$i) { #{ vi + last if $dbline[$i] =~ /^\s*[\;\}\#\n]/; + $after = ($dbline[$i] =~ /\n$/ ? '' : "\n"); + print $LINEINFO "$prefix$i$infix", $dbline[$i], $after; + } + } + } + $evalarg = $action, &eval if $action; + if ($single || $signal) { + local $level = $level + 1; + $evalarg = $pre, &eval if $pre; + print $OUT $#stack . " levels deep in subroutine calls!\n" + if $single & 4; + $start = $line; + CMD: + while (($term || &setterm), + defined ($cmd=$term->readline(" DB" . ('<' x $level) . + ($#hist+1) . ('>' x $level) . + " "))) { + { # <-- Do we know what this brace is for? + $single = 0; + $signal = 0; + $cmd =~ s/\\$/\n/ && do { + $cmd .= $term->readline(" cont: "); + redo CMD; + }; + $cmd =~ /^q$/ && exit 0; + $cmd =~ /^$/ && ($cmd = $laststep); + push(@hist,$cmd) if length($cmd) > 1; + PIPE: { + ($i) = split(/\s+/,$cmd); + eval "\$cmd =~ $alias{$i}", print $OUT $@ if $alias{$i}; + $cmd =~ /^h$/ && do { + print $OUT $help; + next CMD; }; + $cmd =~ /^h\s+h$/ && do { + print $OUT $summary; + next CMD; }; + $cmd =~ /^h\s+(\S)$/ && do { + my $asked = "\Q$1"; + if ($help =~ /^($asked([\s\S]*?)\n)(\Z|[^\s$asked])/m) { + print $OUT $1; + } else { + print $OUT "`$asked' is not a debugger command.\n"; + } + next CMD; }; + $cmd =~ /^t$/ && do { + $trace = !$trace; + print $OUT "Trace = ".($trace?"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 =~ 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(' ',$2); + do 'dumpvar.pl' unless defined &main::dumpvar; + if (defined &main::dumpvar) { + &main::dumpvar($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 = 1; }; + $cmd =~ /^f\b\s*(.*)/ && do { + $file = $1; + if (!$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::)) {{ + $file = substr($try,2); + print "\n$file:\n"; + }} + } + if (!defined $main::{'_<' . $file}) { + print $OUT "There's no code here matching $file.\n"; + next CMD; + } elsif ($file ne $filename) { + *dbline = "::_<$file"; + $max = $#dbline; + $filename = $file; + $start = 1; + $cmd = "l"; + } }; + $cmd =~ /^l\b\s*([\':A-Za-z_][\':\w]*)/ && do { + $subname = $1; + $subname =~ s/\'/::/; + $subname = "main::".$subname unless $subname =~ /::/; + $subname = "main".$subname if substr($subname,0,2) eq "::"; + @pieces = split(/:/,$sub{$subname}); + $subrange = pop @pieces; + $file = join(':', @pieces); + if ($file ne $filename) { + *dbline = "::_<$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; + } }; + $cmd =~ /^w\b\s*(\d*)$/ && do { + $incr = $window - 1; + $start = $1 if $1; + $start -= $preview; + $cmd = 'l ' . $start . '-' . ($start + $incr); }; + $cmd =~ /^-$/ && do { + $incr = $window - 1; + $cmd = 'l ' . ($start-$window*2) . '+'; }; + $cmd =~ /^l$/ && 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 = (!$2) ? $max : ($4 ? $4 : $2); + $end = $max if $end > $max; + $i = $2; + $i = $line if $i eq '.'; + $i = 1 if $i < 1; + if ($emacs) { + print $OUT "\032\032$filename:$i:0\n"; + $i = $end; + } else { + for (; $i <= $end; $i++) { + print $OUT "$i:\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 $OUT "Deleting all breakpoints...\n"; + for ($i = 1; $i <= $max ; $i++) { + if (defined $dbline{$i}) { + $dbline{$i} =~ s/^[^\0]+//; + if ($dbline{$i} =~ s/^\0?$//) { + delete $dbline{$i}; + } + } + } + next CMD; }; + $cmd =~ /^L$/ && do { + for ($i = 1; $i <= $max; $i++) { + if (defined $dbline{$i}) { + 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; + } + } + 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,$i) = ($sub{$subname} =~ /^(.*):(.*)$/); + $i += 0; + if ($i) { + $filename = $file; + *dbline = "::_<$filename"; + $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 { + $dbline{$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 { + 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 { + $pre = action($1); + next CMD; }; + $cmd =~ /^>\s*(.*)/ && do { + $post = action($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 { + $single = 2; + $laststep = $cmd; + last CMD; }; + $cmd =~ /^s$/ && do { + $single = 1; + $laststep = $cmd; + last CMD; }; + $cmd =~ /^c\b\s*(\d*)\s*$/ && do { + $i = $1; + if ($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 { + $stack[$#stack] |= 1; + $doret = 1; + last CMD; }; + $cmd =~ /^T$/ && do { + local($p,$f,$l,$s,$h,$a,$e,$r,@a,@sub); + for ($i = 1; + ($p,$f,$l,$s,$h,$w,$e,$r) = caller($i); + $i++) { + @a = (); + for $arg (@args) { + $_ = "$arg"; + s/([\'\\])/\\$1/g; + s/([^\0]*)/'$1'/ + unless /^(?: -?[\d.]+ | \*[\w:]* )$/x; + s/([\200-\377])/sprintf("M-%c",ord($1)&0177)/eg; + s/([\0-\37\177])/sprintf("^%c",ord($1)^64)/eg; + push(@a, $_); + } + $w = $w ? '@ = ' : '$ = '; + $a = $h ? '(' . join(', ', @a) . ')' : ''; + $e =~ s/\n\s*\;\s*\Z// if $e; + $e =~ s/[\\\']/\\$1/g if $e; + if ($r) { + $s = "require '$e'"; + } elsif (defined $r) { + $s = "eval '$e'"; + } elsif ($s eq '(eval)') { + $s = "eval {...}"; + } + $f = "file `$f'" unless $f eq '-e'; + push(@sub, "$w$s$a called from $f line $l\n"); + last if $signal; + } + for ($i=0; $i <= $#sub; $i++) { + last if $signal; + print $OUT $sub[$i]; + } + 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 = $start; + eval ' + for (;;) { + ++$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 = $start; + eval ' + for (;;) { + --$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] . "\n"; + print $OUT $cmd; + redo CMD; }; + $cmd =~ /^$sh$sh\s*/ && do { + &system($'); + 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] . "\n"; + print $OUT $cmd; + redo CMD; }; + $cmd =~ /^$sh$/ && do { + &system($ENV{SHELL}||"/bin/sh"); + next CMD; }; + $cmd =~ /^$sh\s*/ && do { + &system($ENV{SHELL}||"/bin/sh","-c",$'); + 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: + } # <-- Do we know what this brace is for? + $evalarg = "\$^D = \$^D | \$DB::db_stop;\n$cmd"; &eval; + if ($onetimeDump) { + $onetimeDump = undef; + } else { + 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 ""; + $piped= ""; + } + } # CMD: + if ($post) { + $evalarg = $post; &eval; + } + } # if ($single || $signal) + ($@, $!, $,, $/, $\, $^W) = @saved; + (); +} + +# The following code may be executed now: +# BEGIN {warn 4} + +sub sub { + print $LINEINFO ' ' x $#stack, "entering $sub\n" if $frame; + push(@stack, $single); + $single &= 1; + $single |= 4 if $#stack == $deep; + if (wantarray) { + @ret = &$sub; + $single |= pop(@stack); + $retctx = "list"; + $lastsub = $sub; +print $LINEINFO ' ' x $#stack, "exited $sub\n" if $frame; + @ret; + } else { + $ret = &$sub; + $single |= pop(@stack); + $retctx = "scalar"; + $lastsub = $sub; +print $LINEINFO ' ' x $#stack, "exited $sub\n" if $frame; + $ret; + } +} + +sub save { + @saved = ($@, $!, $,, $/, $\, $^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 = $@; + eval "&DB::save"; + if ($at) { + print $OUT $at; + } elsif ($onetimeDump) { + dumpit(\@res); + } +} + +sub dumpit { + local ($savout) = select($OUT); + do 'dumpvar.pl' unless defined &main::dumpValue; + if (defined &main::dumpValue) { + &main::dumpValue(shift); + } else { + print $OUT "dumpvar.pl not available.\n"; + } + select ($savout); +} + +sub action { + my $action = shift; + while ($action =~ s/\\$//) { + #print $OUT "+ "; + #$action .= "\n"; + $action .= &gets; + } + $action; +} + +sub gets { + local($.); + #; + &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,">&OUT") || &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 { + 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; + + $readline::rl_basic_word_break_characters .= "[:" + if defined $readline::rl_basic_word_break_characters + and index($readline::rl_basic_word_break_characters, ":") == -1; + } + $LINEINFO = $OUT unless defined $LINEINFO; + $lineinfo = $console unless defined $lineinfo; + $term->MinLine(2); +} + +sub readline { + local $frame = 0; + $term->readline(@_); +} + +sub dump_option { + my ($opt, $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 = 'N/A'; + } else { + $val = $option{$opt}; + } + $val =~ s/[\\\']/\\$&/g; + printf $OUT "%20s = '%s'\n", $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 = $1; + } else { #{ to "let some poor schmuck bounce on the % key in B." + my ($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 $val; + eval "require '$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 catch { + $signal = 1; +} + +sub warn { + my($msg)= join("",@_); + $msg .= ": $!\n" unless $msg =~ /\n$/; + print $OUT $msg; +} + +sub TTY { + if ($term) { + &warn("Too late to set TTY!\n") if @_; + } else { + $tty = shift if @_; + } + $tty or $console; +} + +sub noTTY { + if ($term) { + &warn("Too late to set noTTY!\n") if @_; + } else { + $notty = shift if @_; + } + $notty; +} + +sub ReadLine { + if ($term) { + &warn("Too late to set ReadLine!\n") if @_; + } else { + $rl = shift if @_; + } + $rl; +} + +sub NonStop { + if ($term) { + &warn("Too late to set up NonStop mode!\n") if @_; + } else { + $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 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 sethelp { + $help = " +T Stack trace. +s [expr] Single step [in expr]. +n [expr] Next, steps over subroutine calls [in expr]. + Repeat last n or s command. +r Return from current subroutine. +c [line] Continue; optionally inserts a one-time-only breakpoint + at the specified line. +l min+incr List incr+1 lines starting at min. +l min-max List lines min through max. +l line List single line. +l subname List first window of lines from subroutine. +l List next window of lines. +- List previous window of lines. +w [line] List window around line. +f filename Switch to viewing filename. +/pattern/ Search forwards for pattern; final / is optional. +?pattern? Search backwards for pattern; final ? is optional. +L List all breakpoints and actions. +S [[!]pattern] List subroutine names [not] matching pattern. +t Toggle trace mode. +t expr Trace through execution of expr. +b [line] [condition] + Set breakpoint; line defaults to the current execution line; + condition breaks if it evaluates to true, defaults to '1'. +b subname [condition] + Set breakpoint at first line of subroutine. +d [line] Delete the breakpoint for line. +D Delete all breakpoints. +a [line] command + Set an action to be done before the line is executed. + Sequence is: check for breakpoint, print line if necessary, + do action, prompt user if breakpoint or step, evaluate line. +A Delete all actions. +V [pkg [vars]] List some (default all) variables in package (default current). + Use ~pattern and !pattern for positive and negative regexps. +X [vars] Same as \"V currentpackage [vars]\". +x expr Evals expression in array context, dumps the result. +O [opt[=val]] [opt\"val\"] [opt?]... + Set or query values of options. val defaults to 1. opt can + be abbreviated. Several options can be listed. + recallCommand, ShellBang: chars used to recall command or spawn shell; + pager: program for output of \"|cmd\"; + The following options affect what happens with V, X, and x commands: + arrayDepth, hashDepth: print only first N elements ('' for all); + compactDump, veryCompact: change style of array and hash dump; + globPrint: whether to print contents of globs; + DumpDBFiles: dump arrays holding debugged files; + DumpPackages: dump symbol tables of packages; + quote, HighBit, undefPrint: change style of string dump; + tkRunning: run Tk while prompting (with ReadLine); + signalLevel warnLevel dieLevel: level of verbosity; + Option PrintRet affects printing of return value after r command, + frame affects printing messages on entry and exit from subroutines. + During startup options are initialized from \$ENV{PERLDB_OPTS}. + You can put additional initialization options TTY, noTTY, + ReadLine, and NonStop there. +< command Define command to run before each prompt. +> command Define command to run after each prompt. +$prc number Redo a previous command (default previous command). +$prc -number Redo number'th-to-last command. +$prc pattern Redo last command that started with pattern. + See 'O recallCommand' too. +$psh$psh cmd Run cmd in a subprocess (reads from DB::IN, writes to DB::OUT)" + . ( $rc eq $sh ? "" : " +$psh [cmd] Run cmd in subshell (forces \"\$SHELL -c 'cmd'\")." ) . " + See 'O shellBang' too. +H -number Display last number commands (default all). +p expr Same as \"print DB::OUT expr\" in current package. +|dbcmd Run debugger command, piping DB::OUT to current pager. +||dbcmd Same as |dbcmd but DB::OUT is temporarilly select()ed as well. +\= [alias value] Define a command alias, or list current aliases. +command Execute as a perl statement in current package. +h [db_command] Get help [on a specific debugger command], enter |h to page. +h h Summary of debugger commands. +q or ^D Quit. + +"; + $summary = <<"END_SUM"; +List/search source lines: Control script execution: + l [ln|sub] List source code T Stack trace + - List previous lines s [expr] Single step [in expr] + w [line] List around line n [expr] Next, steps over subs + f filename View source in file Repeat last n or s + /pattern/ Search forward r Return from subroutine + ?pattern? Search backward c [line] Continue until line +Debugger controls: L List break pts & actions + O [...] Set debugger options t [expr] Toggle trace [trace expr] + < command Command for before prompt b [ln] [c] Set breakpoint + > command Command for after prompt b sub [c] Set breakpoint for sub + $prc [N|pat] Redo a previous command d [line] Delete a breakpoint + H [-num] Display last num commands D Delete all breakpoints + = [a val] Define/list an alias a [ln] cmd Do cmd before line + h [db_cmd] Get help on command A Delete all actions + |[|]dbcmd Send output to pager $psh\[$psh\] syscmd Run cmd in a subprocess + q or ^D Quit +Data Examination: expr Execute perl code, also see: s,n,t expr + S [[!]pat] List subroutine names [not] matching pattern + V [Pk [Vars]] List Variables in Package. Vars can be ~pattern or !pattern. + X [Vars] Same as \"V current_package [Vars]\". + x expr Evals expression in array context, dumps the result. + p expr Print expression (uses script's current package). +END_SUM + # '); # Fix balance of Emacs parsing +} + + +sub diesignal { + $SIG{'ABRT'} = DEFAULT; + kill 'ABRT', $$ if $panic++; + print $DB::OUT "Got $_[0]!\n"; # in the case cannot continue + local $SIG{__WARN__} = ''; + require Carp; + local $Carp::CarpLevel = 2; # mydie + confess + &warn(Carp::longmess("Signal @_")); + kill 'ABRT', $$; +} + +sub dbwarn { + local $SIG{__WARN__} = ''; + require Carp; + #&warn("Entering dbwarn\n"); + my ($mysingle,$mytrace) = ($single,$trace); + $single = 0; $trace = 0; + my $mess = Carp::longmess(@_); + ($single,$trace) = ($mysingle,$mytrace); + #&warn("Warning in dbwarn\n"); + &warn($mess); + #&warn("Exiting dbwarn\n"); +} + +sub dbdie { + local $SIG{__DIE__} = ''; + local $SIG{__WARN__} = ''; + my $i = 0; my $ineval = 0; my $sub; + #&warn("Entering dbdie\n"); + if ($dieLevel != 2) { + while ((undef,undef,undef,$sub) = caller(++$i)) { + $ineval = 1, last if $sub eq '(eval)'; + } + { + local $SIG{__WARN__} = \&dbwarn; + &warn(@_) if $dieLevel > 2; # Ineval is false during destruction? + } + #&warn("dieing quietly in dbdie\n") if $ineval and $dieLevel < 2; + die @_ if $ineval and $dieLevel < 2; + } + require Carp; + # We do not want to debug this chunk (automatic disabling works + # inside DB::DB, but not in Carp). + my ($mysingle,$mytrace) = ($single,$trace); + $single = 0; $trace = 0; + my $mess = Carp::longmess(@_); + ($single,$trace) = ($mysingle,$mytrace); + #&warn("dieing loudly in dbdie\n"); + die $mess; +} + +# sub diehard { # Always dump, useful if fatal is +# # deeply in evals. +# local $SIG{__DIE__} = ''; +# require Carp; +# # We do not want to debug this (automatic disabling works inside DB::DB) +# my ($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"; + 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; +} + +# 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{__WARN__} = "DB::dbwarn"; + #$SIG{__DIE__} = 'DB::dbdie'; + #$SIG{SEGV} = "DB::diesignal"; + #$SIG{BUS} = "DB::diesignal"; + $SIG{INT} = "DB::catch"; + #$SIG{FPE} = "DB::catch"; + #warn "SIGFPE installed"; + $warnLevel = 1 unless defined $warnLevel; + $dieLevel = 1 unless defined $dieLevel; + $signalLevel = 1 unless defined $signalLevel; + + $db_stop = 0; # Compiler warning + $db_stop = 1 << 30; + $level = 0; # Level of recursive debugging +} + +#use Carp; # This did break, left for debuggin + +1; +package DB; + # modified Perl debugger, to be run from Emacs in perldb-mode # Ray Lischner (uunet!mntgfx!lisch) as of 5 Nov 1990 # Johan Vromans -- upgrade to 4.0 pl 10 diff --git a/lib/sigtrap.pm b/lib/sigtrap.pm index dd4df90..e099ac4 100644 --- a/lib/sigtrap.pm +++ b/lib/sigtrap.pm @@ -47,19 +47,29 @@ sub trap { syswrite(STDERR, "\n", 1); # Now go for broke. - for ($i = 1; ($p,$f,$l,$s,$h,$w) = caller($i); $i++) { - @a = (); + for ($i = 1; ($p,$f,$l,$s,$h,$w,$e,$r) = caller($i); $i++) { + @a = (); for $arg (@args) { $_ = "$arg"; - s/'/\\'/g; + s/([\'\\])/\\$1/g; s/([^\0]*)/'$1'/ - unless /^(?: -?[\d.]+ | \*[\w:]* )$/x; + 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, $_); } $w = $w ? '@ = ' : '$ = '; $a = $h ? '(' . join(', ', @a) . ')' : ''; + $e =~ s/\n\s*\;\s*\Z// if $e; + $e =~ s/[\\\']/\\$1/g if $e; + if ($r) { + $s = "require '$e'"; + } elsif (defined $r) { + $s = "eval '$e'"; + } elsif ($s eq '(eval)') { + $s = "eval {...}"; + } + $f = "file `$f'" unless $f eq '-e'; $mess = "$w$s$a called from $f line $l\n"; syswrite(STDERR, $mess, length($mess)); }