X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2Fperl5db.pl;h=5c8d2727b72506d2c3f6999246d84b0722a40f0d;hb=54d04a52ebe0ed5248ec3caf5cda11b87acffb7b;hp=15a249832418d5ca30321291d073ff00259a245e;hpb=567d72c2df905d84d6219727bd9345d2314e6b6e;p=p5sagit%2Fp5-mst-13.2.git diff --git a/lib/perl5db.pl b/lib/perl5db.pl index 15a2498..5c8d272 100644 --- a/lib/perl5db.pl +++ b/lib/perl5db.pl @@ -1,516 +1,890 @@ package DB; +# Debugger for Perl 5.00x; perl5db.pl patch level: + +$header = 'perl5db.pl patch level 0.94'; + +# Enhanced by ilya@math.ohio-state.edu (Ilya Zakharevich) +# Latest version available: ftp://ftp.math.ohio-state.edu/pub/users/ilya/perl + # modified Perl debugger, to be run from Emacs in perldb-mode # Ray Lischner (uunet!mntgfx!lisch) as of 5 Nov 1990 # Johan Vromans -- upgrade to 4.0 pl 10 +# Ilya Zakharevich -- patches after 5.001 (and some before ;-) -$header = '$RCSfile: perl5db.pl,v $$Revision: 4.1 $$Date: 92/08/07 18:24:07 $'; # # 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. It also inserts a do 'perldb.pl' before the first line. +# 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 $ -# Is Perl being run from Emacs? -$emacs = ((defined $main::ARGV[0]) and ($main::ARGV[0] eq '-emacs')); -shift(@main::ARGV) if $emacs; +# +# 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"!) +# + +# Needed for the statement after exec(): -#require Term::ReadLine; +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, + $readline::Tk_toloop, + $dumpvar::usageOnly, + @ARGS, + $Carp::CarpLevel, + $panic, + $first_time, + ) if 0; -local($^W) = 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!). +@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") { - $console = "/dev/tty"; - $rcfile=".perldb"; + $rcfile=".perldb"; +} else { + $rcfile="perldb.ini"; } -elsif (-e "con") { - $console = "con"; - $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"; } -else { - $console = "sys\$command"; - $rcfile="perldb.ini"; + +if (defined $ENV{PERLDB_OPTS}) { + parse_options($ENV{PERLDB_OPTS}); } -# Around a bug: -if (defined $ENV{'OS2_SHELL'}) { # In OS/2 - if ($DB::emacs) { +if (exists $ENV{PERLDB_RESTART}) { + delete $ENV{PERLDB_RESTART}; + # $restart = 1; + @hist = get_list('PERLDB_HIST'); + my @visited = get_list("PERLDB_VISITED"); + for (0 .. $#visited) { + %{$postponed{$visited[$_]}} = get_list("PERLDB_FILE_$_"); + } + 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; +} + +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 { - $console = "/dev/con"; + 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"; } } -open(IN, "<$console") || open(IN, "<&STDIN"); # so we don't dingle stdin -open(OUT,">$console") || open(OUT, ">&STDERR") - || open(OUT, ">&STDOUT"); # so we don't dongle stdout -select(OUT); -$| = 1; # for DB::OUT -select(STDOUT); -$| = 1; # for real STDOUT -$sub = ''; +@ARGS = @ARGV; +for (@args) { + s/\'/\\\'/g; + s/(.*)/'$1'/ unless /^-?[\d.]+$/; +} -$header =~ s/.Header: ([^,]+),v(\s+\S+\s+\S+).*$/$1$2/; -print OUT "\nLoading DB routines from $header\n"; -print OUT ("Emacs support ", - $emacs ? "enabled" : "available", - ".\n"); -print OUT "\nEnter h for help.\n\n"; +if (defined &afterinit) { # May be defined in $rcfile + &afterinit(); +} -@ARGS; +############################################################ Subroutines sub DB { + unless ($first_time++) { # Do when-running init + if ($runnonstop) { # Disable until signal + for ($i=0; $i <= $#stack; ) { + $stack[$i++] &= ~1; + } + $single = 0; + return; + } + # Define a subroutine in which we will stop +# eval <<'EOE'; +# sub at_end::db {"Debuggee terminating";} +# END { +# $DB::step = 1; +# print $OUT "Debuggee terminating.\n"; +# &at_end::db;} +# EOE + } &save; - ($pkg, $filename, $line) = caller; + 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; + $filename_ini = $filename; $usercontext = '($@, $!, $,, $/, $\, $^W) = @saved;' . - "package $pkg;"; # this won't let them modify, alas + "package $package;"; # this won't let them modify, alas local(*dbline) = "::_<$filename"; + install_breakpoints($filename) unless $visited{$filename}++; $max = $#dbline; if (($stop,$action) = split(/\0/,$dbline{$line})) { if ($stop eq '1') { $signal |= 1; - } - else { + } elsif ($stop) { $evalarg = "\$DB::signal |= do {$stop;}"; &eval; $dbline{$line} =~ s/;9($|\0)/$1/; } } if ($single || $trace || $signal) { + $term || &setterm; if ($emacs) { - print OUT "\032\032$filename:$line:0\n"; + $position = "\032\032$filename:$line:0\n"; + print $LINEINFO $position; } else { - $prefix = $sub =~ /'|::/ ? "" : "${pkg}::"; + $sub =~ s/\'/::/; + $prefix = $sub =~ /::/ ? "" : "${'package'}::"; $prefix .= "$sub($filename:"; + $after = ($dbline[$line] =~ /\n$/ ? '' : "\n"); if (length($prefix) > 30) { - print OUT "$prefix$line):\n$line:\t",$dbline[$line]; + $position = "$prefix$line):\n$line:\t$dbline[$line]$after"; + print $LINEINFO $position; $prefix = ""; $infix = ":\t"; - } - else { + } else { $infix = "):\t"; - print OUT "$prefix$line$infix",$dbline[$line]; + $position = "$prefix$line$infix$dbline[$line]$after"; + print $LINEINFO $position; } - for ($i = $line + 1; $i <= $max && $dbline[$i] == 0; ++$i) { - last if $dbline[$i] =~ /^\s*(}|#|\n)/; - print OUT "$prefix$i$infix",$dbline[$i]; + for ($i = $line + 1; $i <= $max && $dbline[$i] == 0; ++$i) { #{ vi + last if $dbline[$i] =~ /^\s*[\;\}\#\n]/; + $after = ($dbline[$i] =~ /\n$/ ? '' : "\n"); + $incr_pos = "$prefix$i$infix$dbline[$i]$after"; + print $LINEINFO $incr_pos; + $position .= $incr_pos; } } } $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; + print $OUT $#stack . " levels deep in subroutine calls!\n" + if $single & 4; $start = $line; CMD: - while ((print OUT " DB<", $#hist+1, "> "), $cmd=&gets) { - { + while (($term || &setterm), + defined ($cmd=&readline(" DB" . ('<' x $level) . + ($#hist+1) . ('>' x $level) . + " "))) { + #{ # <-- Do we know what this brace is for? $single = 0; $signal = 0; - $cmd eq '' && exit 0; - chop($cmd); - $cmd =~ s/\\$// && do { - print OUT " cont: "; - $cmd .= &gets; + $cmd =~ s/\\$/\n/ && do { + $cmd .= &readline(" cont: "); redo CMD; }; $cmd =~ /^q$/ && exit 0; $cmd =~ /^$/ && ($cmd = $laststep); push(@hist,$cmd) if length($cmd) > 1; - ($i) = split(/\s+/,$cmd); - eval "\$cmd =~ $alias{$i}", print OUT $@ if $alias{$i}; - $cmd =~ /^h$/ && do { - print OUT " -T Stack trace. -s Single step. -n Next, steps over subroutine calls. -r Return from current subroutine. -c [line] Continue; optionally inserts a one-time-only breakpoint - at the specified line. - Repeat last n or s. -l min+incr List incr+1 lines starting at min. -l min-max List lines. -l line List line; -l List next window. -- List previous window. -w line List window around line. -l subname List subroutine. -f filename Switch to filename. -/pattern/ Search forwards for pattern; final / is optional. -?pattern? Search backwards for pattern. -L List breakpoints and actions. -S List subroutine names. -t Toggle trace mode. -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 breakpoint. -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). -X [vars] Same as \"V currentpackage [vars]\". -< command Define command before prompt. -> command Define command after prompt. -! number Redo command (default previous command). -! -number Redo number\'th to last command. -H -number Display last number commands (default all). -q or ^D Quit. -p expr Same as \"print DB::OUT expr\" in current package. -= [alias value] Define a command alias, or list current aliases. -command Execute as a perl statement in current package. - -"; - next CMD; }; - $cmd =~ /^t$/ && do { - $trace = !$trace; - print OUT "Trace = ".($trace?"on":"off")."\n"; - next CMD; }; - $cmd =~ /^S$/ && do { - foreach $subname (sort(keys %sub)) { - print OUT $subname,"\n"; - } - next CMD; }; - $cmd =~ s/^X\b/V $pkg/; - $cmd =~ /^V$/ && do { - $cmd = "V $pkg"; }; - $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 DB::OUT "dumpvar.pl not available.\n"; - } - select ($savout); - next CMD; }; - $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"; + 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"; } - } - if (!defined $main::{'_<' . $file}) { - print OUT "There's no code here anything 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 = "main::" . $subname unless $subname =~ /'|::/; - $subname = "main" . $subname if substr($subname,0,1)eq "'"; - $subname = "main" . $subname if substr($subname,0,2)eq "::"; - # VMS filespecs may (usually do) contain ':', so don't use split - ($file,$subrange) = $sub{$subname} =~ /(.*):(.*)/; - if ($file ne $filename) { - *dbline = "::_<$file"; - $max = $#dbline; - $filename = $file; - } - if ($subrange) { - if (eval($subrange) < -$window) { - $subrange =~ s/-.*/+/; + 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"; + } } - $cmd = "l $subrange"; - } else { - print OUT "Subroutine $1 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; + 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; + &main::dumpvar($packname,@vars); + } else { + print $OUT "dumpvar.pl not available.\n"; } - } - $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}; - } + 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; } - } - 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; + 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"; + $visited{$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"; + $visited{$file}++; + $max = $#dbline; + $filename = $file; } - } - next CMD; }; - $cmd =~ /^b\b\s*([':A-Za-z_][':\w]*)\s*(.*)/ && do { - $subname = $1; - $cond = $2 || '1'; - $subname = "${pkg}::" . $subname - unless $subname =~ /'|::/; - $subname = "main" . $subname if substr($subname,0,1) eq "'"; - $subname = "main" . $subname if substr($subname,0,2) eq "::"; - # VMS filespecs may (usually do) contain ':', so don't use split - ($filename,$i) = $sub{$subname} =~ /(.*):(.*)/; - $i += 0; - if ($i) { + if ($subrange) { + if (eval($subrange) < -$window) { + $subrange =~ s/-.*/+/; + } + $cmd = "l $subrange"; + } else { + print $OUT "Subroutine $subname not found.\n"; + next CMD; + } }; + $cmd =~ /^\.$/ && do { + $start = $line; + $filename = $filename_ini; *dbline = "::_<$filename"; - ++$i while $dbline[$i] == 0 && $i < $#dbline; - $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 ''; + $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 { + $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 = (!defined $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++) { + ($stop,$action) = split(/\0/, $dbline{$i}); + $arrow = ($i==$line + and $filename eq $filename_ini) + ? '==>' + : ':' ; + $arrow .= 'b' if $stop; + $arrow .= 'a' if $action; + print $OUT "$i$arrow\t", $dbline[$i]; + last if $signal; + } } - } - 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; - if ($dbline[$i] == 0) { - print OUT "Line $i may not have an action.\n"; - } else { - $dbline{$i} =~ s/\0[^\0]*//; - $dbline{$i} .= "\0" . action($3); - } - 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) { + $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"; + $visited{$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"; - next CMD; + print $OUT "Line $i not breakable.\n"; + } else { + $dbline{$i} =~ s/^[^\0]*/$cond/; } - $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] |= 2; - last CMD; }; - $cmd =~ /^T$/ && do { - local($p,$f,$l,$s,$h,$a,@a,@sub); - for ($i = 1; ($p,$f,$l,$s,$h,$w) = caller($i); $i++) { - @a = (); - for $arg (@args) { - $_ = "$arg"; - s/'/\\'/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, $_); + 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 ''; + } } - $w = $w ? '@ = ' : '$ = '; - $a = $h ? '(' . join(', ', @a) . ')' : ''; - push(@sub, "$w$s$a from file $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; + 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); } - $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"; + next CMD; }; + $cmd =~ /^n$/ && do { + $single = 2; + $laststep = $cmd; + last CMD; }; + $cmd =~ /^s$/ && do { + $single = 1; + $laststep = $cmd; + last CMD; }; + $cmd =~ /^c\b\s*([\w:]*)\s*$/ && do { + $i = $1; + if ($i =~ /\D/) { # subroutine name + ($file,$i) = ($sub{$i} =~ /^(.*):(.*)$/); + $i += 0; + if ($i) { + $filename = $file; + *dbline = "::_<$filename"; + $visited{$filename}++; + $max = $#dbline; + ++$i while $dbline[$i] == 0 && $i < $max; } else { - print OUT "$start:\t", $dbline[$start], "\n"; + print $OUT "Subroutine $subname not found.\n"; + next CMD; } - 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; + 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. } - $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"; + for ($i=0; $i <= $#stack; ) { + $stack[$i++] &= ~1; + } + last CMD; }; + $cmd =~ /^r$/ && do { + $stack[$#stack] |= 1; + $doret = 1; + last CMD; }; + $cmd =~ /^R$/ && do { + print $OUT "Warning: a lot of 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 @visited = keys %visited; + set_list("PERLDB_VISITED", @visited); + set_list("PERLDB_OPT", %option); + for (0 .. $#visited) { + *dbline = "::_<$visited[$_]"; + set_list("PERLDB_FILE_$_", %dbline); + } + $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 { + 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 {...}"; } - last; + $f = "file `$f'" unless $f eq '-e'; + push(@sub, "$w$s$a called from $f line $l\n"); + last if $signal; } - } '; - print OUT "?$pat?: not found\n" if ($start == $end); - next CMD; }; - $cmd =~ /^!+\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 =~ /^!(.+)$/ && 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 =~ /^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$1/; - $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"; + 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; }; + 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"; } - $evalarg = $cmd; &eval; - 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; @@ -519,14 +893,55 @@ sub save { # The following takes its argument via $evalarg to preserve current @_ sub eval { - eval "$usercontext $evalarg; &DB::save"; - print OUT $@; + 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 install_breakpoints { + my $filename = shift; + return unless exists $postponed{$filename}; + my %break = %{$postponed{$filename}}; + for (keys %break) { + my $i = $_; + #if (/\D/) { # Subroutine name + #} + $dbline{$i} = $break{$_}; # Cannot be done before the file is around + } +} + +sub dumpit { + local ($savout) = select($OUT); + do 'dumpvar.pl' unless defined &main::dumpValue; + if (defined &main::dumpValue) { + local $frame = 0; + &main::dumpValue(shift); + } else { + print $OUT "dumpvar.pl not available.\n"; + } + select ($savout); } sub action { - local($action) = @_; + my $action = shift; while ($action =~ s/\\$//) { - print OUT "+ "; + #print $OUT "+ "; + #$action .= "\n"; $action .= &gets; } $action; @@ -534,52 +949,498 @@ sub 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 { + local $frame = 0; + 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; + $term->MinLine(2); + if ($term->Features->{setHistory} and "@hist" ne "?") { + $term->SetHistory(@hist); + } +} + +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; + $term->readline(@_); +} + +sub dump_option { + my ($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 $val; + eval "local \$frame = 0; require '$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; + $val =~ s/[\0-\37\177\200-\377]/"\\0x" . unpack('H2',$&)/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; } -sub sub { - push(@stack, $single); - $single &= 1; - $single |= 4 if $#stack == $deep; - if (wantarray) { - @i = &$sub; - $single |= pop(@stack); - @i; +sub warn { + my($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 @_; } - else { - $i = &$sub; - $single |= pop(@stack); - $i; + $tty or $console; +} + +sub noTTY { + if ($term) { + &warn("Too late to set noTTY!\n") if @_; + } else { + $notty = shift if @_; } + $notty; } -$trace = $signal = $single = 0; # uninitialized warning suppression +sub ReadLine { + if ($term) { + &warn("Too late to set ReadLine!\n") if @_; + } else { + $rl = shift if @_; + } + $rl; +} -@hist = ('?'); -$SIG{'INT'} = "DB::catch"; -$deep = 100; # warning if stack gets this deep -$window = 10; -$preview = 3; +sub NonStop { + if ($term) { + &warn("Too late to set up NonStop mode!\n") if @_; + } else { + $runnonstop = shift if @_; + } + $runnonstop; +} -@stack = (0); -@ARGS = @ARGV; -for (@args) { - s/'/\\'/g; - s/(.*)/'$1'/ unless /^-?[\d.]+$/; +sub pager { + if (@_) { + $pager = shift; + $pager="|".$pager unless $pager =~ /^(\+?\>|\|)/; + } + $pager; } -if (-f $rcfile) { - do "./$rcfile"; +sub shellBang { + if (@_) { + $sh = quotemeta shift; + $sh .= "\\b" if $sh =~ /\w$/; + } + $psh = $sh; + $psh =~ s/\\b$//; + $psh =~ s/\\(.)/$1/g; + &sethelp; + $psh; } -elsif (-f "$ENV{'LOGDIR'}/$rcfile") { - do "$ENV{'LOGDIR'}/$rcfile"; + +sub recallCommand { + if (@_) { + $rc = quotemeta shift; + $rc .= "\\b" if $rc =~ /\w$/; + } + $prc = $rc; + $prc =~ s/\\b$//; + $prc =~ s/\\(.)/$1/g; + &sethelp; + $prc; } -elsif (-f "$ENV{'HOME'}/$rcfile") { - do "$ENV{'HOME'}/$rcfile"; + +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. +. Return to the executed 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 for the current file. +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. +R Pure-man-restart of debugger, debugger state and command-line + options are lost. +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 + - or . List previous/current line 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 R Attempt a restart +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 { + local $frame = 0; + $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 $frame = 0; + 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 $frame = 0; + 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 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; + $level = 0; # Level of recursive debugging +} + +BEGIN {$^W = $ini_warn;} # Switch warnings back + +#use Carp; # This did break, left for debuggin + 1;