X-Git-Url: https://perl5.git.perl.org/perl5.git/blobdiff_plain/3fbd655246e7129e7a25b47b134d3427eecbe312..ec9edb2ec3ca34b14bf6a2fa1d8f828c8ab93fee:/lib/perl5db.pl diff --git a/lib/perl5db.pl b/lib/perl5db.pl index 7c5b0a9..45e6a19 100644 --- a/lib/perl5db.pl +++ b/lib/perl5db.pl @@ -1,24 +1,53 @@ package DB; # Debugger for Perl 5.00x; perl5db.pl patch level: +$VERSION = 1.19; +$header = "perl5db.pl version $VERSION"; -$VERSION = 1.06; -$header = "perl5db.pl version $VERSION"; - -# Enhanced by ilya@math.ohio-state.edu (Ilya Zakharevich) -# Latest version available: ftp://ftp.math.ohio-state.edu/pub/users/ilya/perl - -# modified Perl debugger, to be run from Emacs in perldb-mode -# Ray Lischner (uunet!mntgfx!lisch) as of 5 Nov 1990 -# Johan Vromans -- upgrade to 4.0 pl 10 -# Ilya Zakharevich -- patches after 5.001 (and some before ;-) +# It is crucial that there is no lexicals in scope of `eval ""' down below +sub eval { + # 'my' would make it visible from user code + # but so does local! --tchrist [... into @DB::res, not @res. IZ] + local @res; + { + local $otrace = $trace; + local $osingle = $single; + local $od = $^D; + { ($evalarg) = $evalarg =~ /(.*)/s; } + @res = eval "$usercontext $evalarg;\n"; # '\n' for nice recursive debug + $trace = $otrace; + $single = $osingle; + $^D = $od; + } + my $at = $@; + local $saved[0]; # Preserve the old value of $@ + eval { &DB::save }; + if ($at) { + local $\ = ''; + print $OUT $at; + } elsif ($onetimeDump) { + if ($onetimeDump eq 'dump') { + local $option{dumpDepth} = $onetimedumpDepth + if defined $onetimedumpDepth; + dumpit($OUT, \@res); + } elsif ($onetimeDump eq 'methods') { + methods($res[0]) ; + } + } + @res; +} +# After this point it is safe to introduce lexicals +# However, one should not overdo it: leave as much control from outside as possible # # This file is automatically included if you do perl -d. # It's probably not useful to include this yourself. # +# Before venturing further into these twisty passages, it is +# wise to read the perldebguts man page or risk the ire of dragons. +# # Perl supplies the values for %sub. It effectively inserts -# a &DB'DB(); in front of every place that can have a +# 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. @@ -33,16 +62,17 @@ $header = "perl5db.pl version $VERSION"; # if caller() is called from the package DB, it provides some # additional data. # -# The array @{$main::{'_<'.$filename} is the line-by-line contents of -# $filename. +# The array @{$main::{'_<'.$filename}} (herein called @dbline) is the +# line-by-line contents of $filename. # -# The hash %{'_<'.$filename} contains breakpoints and action (it is -# keyed by line number), and individual entries are settable (as -# opposed to the whole hash). Only true/false is important to the -# interpreter, though the values used by perl5db.pl have the form -# "$break_condition\0$action". Values are magical in numeric context. +# The hash %{'_<'.$filename} (herein called %dbline) contains +# breakpoints and action (it is keyed by line number), and individual +# entries are settable (as opposed to the whole hash). Only true/false +# is important to the interpreter, though the values used by +# perl5db.pl have the form "$break_condition\0$action". Values are +# magical in numeric context. # -# The scalar ${'_<'.$filename} contains "_<$filename". +# The scalar ${'_<'.$filename} contains $filename. # # Note that no subroutine call is possible until &DB::sub is defined # (for subroutines defined outside of the package DB). In fact the same is @@ -88,6 +118,14 @@ $header = "perl5db.pl version $VERSION"; # reset LineInfo to something "interactive"!) # ################################################################## + +# Enhanced by ilya@math.ohio-state.edu (Ilya Zakharevich) + +# 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 ;-) + # Changelog: # A lot of things changed after 0.94. First of all, core now informs @@ -118,7 +156,7 @@ $header = "perl5db.pl version $VERSION"; # Some additional words on internal work of debugger. # `b load filename' implemented. # `b postpone subr' implemented. -# now only `q' exits debugger (overwriteable on $inhibit_exit). +# now only `q' exits debugger (overwritable on $inhibit_exit). # When restarting debugger breakpoints/actions persist. # Buglet: When restarting debugger only one breakpoint/action per # autoloaded function persists. @@ -128,7 +166,7 @@ $header = "perl5db.pl version $VERSION"; # new `inhibitExit' option. # printing of a very long statement interruptible. # Changes: 0.98: New command `m' for printing possible methods -# 'l -' is a synonim for `-'. +# 'l -' is a synonym for `-'. # Cosmetic bugs in printing stack trace. # `frame' & 8 to print "expanded args" in stack trace. # Can list/break in imported subs. @@ -144,7 +182,145 @@ $header = "perl5db.pl version $VERSION"; # `b load' strips trailing whitespace. # completion ignores leading `|'; takes into account current package # when completing a subroutine name (same for `l'). - +# Changes: 1.07: Many fixed by tchrist 13-March-2000 +# BUG FIXES: +# + Added bare minimal security checks on perldb rc files, plus +# comments on what else is needed. +# + Fixed the ornaments that made "|h" completely unusable. +# They are not used in print_help if they will hurt. Strip pod +# if we're paging to less. +# + Fixed mis-formatting of help messages caused by ornaments +# to restore Larry's original formatting. +# + Fixed many other formatting errors. The code is still suboptimal, +# and needs a lot of work at restructuring. It's also misindented +# in many places. +# + Fixed bug where trying to look at an option like your pager +# shows "1". +# + Fixed some $? processing. Note: if you use csh or tcsh, you will +# lose. You should consider shell escapes not using their shell, +# or else not caring about detailed status. This should really be +# unified into one place, too. +# + Fixed bug where invisible trailing whitespace on commands hoses you, +# tricking Perl into thinking you weren't calling a debugger command! +# + Fixed bug where leading whitespace on commands hoses you. (One +# suggests a leading semicolon or any other irrelevant non-whitespace +# to indicate literal Perl code.) +# + Fixed bugs that ate warnings due to wrong selected handle. +# + Fixed a precedence bug on signal stuff. +# + Fixed some unseemly wording. +# + Fixed bug in help command trying to call perl method code. +# + Fixed to call dumpvar from exception handler. SIGPIPE killed us. +# ENHANCEMENTS: +# + Added some comments. This code is still nasty spaghetti. +# + Added message if you clear your pre/post command stacks which was +# very easy to do if you just typed a bare >, <, or {. (A command +# without an argument should *never* be a destructive action; this +# API is fundamentally screwed up; likewise option setting, which +# is equally buggered.) +# + Added command stack dump on argument of "?" for >, <, or {. +# + Added a semi-built-in doc viewer command that calls man with the +# proper %Config::Config path (and thus gets caching, man -k, etc), +# or else perldoc on obstreperous platforms. +# + Added to and rearranged the help information. +# + Detected apparent misuse of { ... } to declare a block; this used +# to work but now is a command, and mysteriously gave no complaint. +# +# Changes: 1.08: Apr 25, 2001 Jon Eveland +# BUG FIX: +# + This patch to perl5db.pl cleans up formatting issues on the help +# summary (h h) screen in the debugger. Mostly columnar alignment +# issues, plus converted the printed text to use all spaces, since +# tabs don't seem to help much here. +# +# Changes: 1.09: May 19, 2001 Ilya Zakharevich +# 0) Minor bugs corrected; +# a) Support for auto-creation of new TTY window on startup, either +# unconditionally, or if started as a kid of another debugger session; +# b) New `O'ption CreateTTY +# I bits control attempts to create a new TTY on events: +# 1: on fork() 2: debugger is started inside debugger +# 4: on startup +# c) Code to auto-create a new TTY window on OS/2 (currently one +# extra window per session - need named pipes to have more...); +# d) Simplified interface for custom createTTY functions (with a backward +# compatibility hack); now returns the TTY name to use; return of '' +# means that the function reset the I/O handles itself; +# d') Better message on the semantic of custom createTTY function; +# e) Convert the existing code to create a TTY into a custom createTTY +# function; +# f) Consistent support for TTY names of the form "TTYin,TTYout"; +# g) Switch line-tracing output too to the created TTY window; +# h) make `b fork' DWIM with CORE::GLOBAL::fork; +# i) High-level debugger API cmd_*(): +# cmd_b_load($filenamepart) # b load filenamepart +# cmd_b_line($lineno [, $cond]) # b lineno [cond] +# cmd_b_sub($sub [, $cond]) # b sub [cond] +# cmd_stop() # Control-C +# cmd_d($lineno) # d lineno (B) +# The cmd_*() API returns FALSE on failure; in this case it outputs +# the error message to the debugging output. +# j) Low-level debugger API +# break_on_load($filename) # b load filename +# @files = report_break_on_load() # List files with load-breakpoints +# breakable_line_in_filename($name, $from [, $to]) +# # First breakable line in the +# # range $from .. $to. $to defaults +# # to $from, and may be less than $to +# breakable_line($from [, $to]) # Same for the current file +# break_on_filename_line($name, $lineno [, $cond]) +# # Set breakpoint,$cond defaults to 1 +# break_on_filename_line_range($name, $from, $to [, $cond]) +# # As above, on the first +# # breakable line in range +# break_on_line($lineno [, $cond]) # As above, in the current file +# break_subroutine($sub [, $cond]) # break on the first breakable line +# ($name, $from, $to) = subroutine_filename_lines($sub) +# # The range of lines of the text +# The low-level API returns TRUE on success, and die()s on failure. +# +# Changes: 1.10: May 23, 2001 Daniel Lewart +# BUG FIXES: +# + Fixed warnings generated by "perl -dWe 42" +# + Corrected spelling errors +# + Squeezed Help (h) output into 80 columns +# +# Changes: 1.11: May 24, 2001 David Dyck +# + Made "x @INC" work like it used to +# +# Changes: 1.12: May 24, 2001 Daniel Lewart +# + Fixed warnings generated by "O" (Show debugger options) +# + Fixed warnings generated by "p 42" (Print expression) +# Changes: 1.13: Jun 19, 2001 Scott.L.Miller@compaq.com +# + Added windowSize option +# Changes: 1.14: Oct 9, 2001 multiple +# + Clean up after itself on VMS (Charles Lane in 12385) +# + Adding "@ file" syntax (Peter Scott in 12014) +# + Debug reloading selfloaded stuff (Ilya Zakharevich in 11457) +# + $^S and other debugger fixes (Ilya Zakharevich in 11120) +# + Forgot a my() declaration (Ilya Zakharevich in 11085) +# Changes: 1.15: Nov 6, 2001 Michael G Schwern +# + Updated 1.14 change log +# + Added *dbline explainatory comments +# + Mentioning perldebguts man page +# Changes: 1.16: Feb 15, 2002 Mark-Jason Dominus +# + $onetimeDump improvements +# Changes: 1.17: Feb 20, 2002 Richard Foley +# Moved some code to cmd_[.]()'s for clarity and ease of handling, +# rationalised the following commands and added cmd_wrapper() to +# enable switching between old and frighteningly consistent new +# behaviours for diehards: 'o CommandSet=pre580' (sigh...) +# a(add), A(del) # action expr (added del by line) +# + b(add), B(del) # break [line] (was b,D) +# + w(add), W(del) # watch expr (was W,W) added del by expr +# + h(summary), h h(long) # help (hh) (was h h,h) +# + m(methods), M(modules) # ... (was m,v) +# + o(option) # lc (was O) +# + v(view code), V(view Variables) # ... (was w,V) +# Changes: 1.18: Mar 17, 2002 Richard Foley +# + fixed missing cmd_O bug +# Changes: 1.19: Mar 29, 2002 Spider Boardman +# + Added missing local()s -- DB::DB is called recursively. +# #################################################################### # Needed for the statement after exec(): @@ -175,25 +351,28 @@ $trace = $signal = $single = 0; # Uninitialized warning suppression # (local $^W cannot help - other packages!). $inhibit_exit = $option{PrintRet} = 1; -@options = qw(hashDepth arrayDepth DumpDBFiles DumpPackages DumpReused +@options = qw(hashDepth arrayDepth CommandSet dumpDepth + DumpDBFiles DumpPackages DumpReused compactDump veryCompact quote HighBit undefPrint globPrint PrintRet UsageOnly frame AutoTrace TTY noTTY ReadLine NonStop LineInfo maxTraceLen recallCommand ShellBang pager tkRunning ornaments signalLevel warnLevel dieLevel inhibit_exit - ImmediateStop bareStringify - RemotePort); + ImmediateStop bareStringify CreateTTY + RemotePort windowSize); %optionVars = ( hashDepth => \$dumpvar::hashDepth, arrayDepth => \$dumpvar::arrayDepth, + CommandSet => \$CommandSet, DumpDBFiles => \$dumpvar::dumpDBFiles, DumpPackages => \$dumpvar::dumpPackages, DumpReused => \$dumpvar::dumpReused, HighBit => \$dumpvar::quoteHighBit, undefPrint => \$dumpvar::printUndef, globPrint => \$dumpvar::globPrint, - UsageOnly => \$dumpvar::usageOnly, + UsageOnly => \$dumpvar::usageOnly, + CreateTTY => \$CreateTTY, bareStringify => \$dumpvar::bareStringify, frame => \$frame, AutoTrace => \$trace, @@ -201,6 +380,7 @@ $inhibit_exit = $option{PrintRet} = 1; maxTraceLen => \$maxtrace, ImmediateStop => \$ImmediateStop, RemotePort => \$remoteport, + windowSize => \$window, ); %optionAction = ( @@ -230,43 +410,115 @@ $inhibit_exit = $option{PrintRet} = 1; ); # These guys may be defined in $ENV{PERL5DB} : -$rl = 1 unless defined $rl; -$warnLevel = 1 unless defined $warnLevel; -$dieLevel = 1 unless defined $dieLevel; -$signalLevel = 1 unless defined $signalLevel; -$pre = [] unless defined $pre; -$post = [] unless defined $post; -$pretype = [] unless defined $pretype; +$rl = 1 unless defined $rl; +$warnLevel = 1 unless defined $warnLevel; +$dieLevel = 1 unless defined $dieLevel; +$signalLevel = 1 unless defined $signalLevel; +$pre = [] unless defined $pre; +$post = [] unless defined $post; +$pretype = [] unless defined $pretype; +$CreateTTY = 3 unless defined $CreateTTY; +$CommandSet = '580' unless defined $CommandSet; + warnLevel($warnLevel); dieLevel($dieLevel); signalLevel($signalLevel); -&pager((defined($ENV{PAGER}) - ? $ENV{PAGER} - : ($^O eq 'os2' - ? 'cmd /c more' - : 'more'))) unless defined $pager; + +pager( + defined $ENV{PAGER} ? $ENV{PAGER} : + eval { require Config } && + defined $Config::Config{pager} ? $Config::Config{pager} + : 'more' + ) unless defined $pager; +setman(); &recallCommand("!") unless defined $prc; &shellBang("!") unless defined $psh; +sethelp(); $maxtrace = 400 unless defined $maxtrace; +$ini_pids = $ENV{PERLDB_PIDS}; +if (defined $ENV{PERLDB_PIDS}) { + $pids = "[$ENV{PERLDB_PIDS}]"; + $ENV{PERLDB_PIDS} .= "->$$"; + $term_pid = -1; +} else { + $ENV{PERLDB_PIDS} = "$$"; + $pids = "{pid=$$}"; + $term_pid = $$; +} +$pidprompt = ''; +*emacs = $slave_editor if $slave_editor; # May be used in afterinit()... -if (-e "/dev/tty") { +if (-e "/dev/tty") { # this is the wrong metric! $rcfile=".perldb"; } else { $rcfile="perldb.ini"; } +# This isn't really safe, because there's a race +# between checking and opening. The solution is to +# open and fstat the handle, but then you have to read and +# eval the contents. But then the silly thing gets +# your lexical scope, which is unfortunately at best. +sub safe_do { + my $file = shift; + + # Just exactly what part of the word "CORE::" don't you understand? + local $SIG{__WARN__}; + local $SIG{__DIE__}; + + unless (is_safe_file($file)) { + CORE::warn < $remoteport, Proto => 'tcp', ); - if (!$OUT) { die "Could not create socket to connect to remote host."; } + if (!$OUT) { die "Unable to connect to remote host: $remoteport\n"; } $IN = $OUT; - } - else { - if (defined $console) { - open(IN,"+<$console") || open(IN,"<$console") || open(IN,"<&STDIN"); - open(OUT,"+>$console") || open(OUT,">$console") || open(OUT,">&STDERR") + } else { + create_IN_OUT(4) if $CreateTTY & 4; + if ($console) { + my ($i, $o) = split /,/, $console; + $o = $i unless defined $o; + open(IN,"+<$i") || open(IN,"<$i") || open(IN,"<&STDIN"); + open(OUT,"+>$o") || open(OUT,">$o") || open(OUT,">&STDERR") || open(OUT,">&STDOUT"); # so we don't dongle stdout - } else { + } elsif (not defined $console) { 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; + $IN = \*IN, $OUT = \*OUT if $console or not defined $console; } - select($OUT); + my $previous = select($OUT); $| = 1; # for DB::OUT - select(STDOUT); + select($previous); $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, run `perldoc perldebug' for more help.\n\n"; + local $\ = ''; + local $, = ''; + if ($term_pid eq '-1') { + print $OUT "\nDaughter DB session started...\n"; + } else { + print $OUT "\nLoading DB routines from $header\n"; + print $OUT ("Editor support ", + $slave_editor ? "enabled" : "available", + ".\n"); + print $OUT "\nEnter h or `h h' for help, or `$doccmd perldebug' for more help.\n\n"; + } } } @@ -400,36 +666,44 @@ sub DB { } $runnonstop = 0 if $single or $signal; # Disable it if interactive. &save; - ($package, $filename, $line) = caller; - $filename_ini = $filename; - $usercontext = '($@, $!, $^E, $,, $/, $\, $^W) = @saved;' . + local($package, $filename, $line) = caller; + local $filename_ini = $filename; + local $usercontext = '($@, $!, $^E, $,, $/, $\, $^W) = @saved;' . "package $package;"; # this won't let them modify, alas local(*dbline) = $main::{'_<' . $filename}; - $max = $#dbline; - if (($stop,$action) = split(/\0/,$dbline{$line})) { - if ($stop eq '1') { - $signal |= 1; - } elsif ($stop) { - $evalarg = "\$DB::signal |= 1 if do {$stop}"; &eval; - $dbline{$line} =~ s/;9($|\0)/$1/; - } + + # we need to check for pseudofiles on Mac OS (these are files + # not attached to a filename, but instead stored in Dev:Pseudo) + if ($^O eq 'MacOS' && $#dbline < 0) { + $filename_ini = $filename = 'Dev:Pseudo'; + *dbline = $main::{'_<' . $filename}; + } + + local $max = $#dbline; + if ($dbline{$line} && (($stop,$action) = split(/\0/,$dbline{$line}))) { + if ($stop eq '1') { + $signal |= 1; + } elsif ($stop) { + $evalarg = "\$DB::signal |= 1 if do {$stop}"; &eval; + $dbline{$line} =~ s/;9($|\0)/$1/; + } } my $was_signal = $signal; if ($trace & 2) { for (my $n = 0; $n <= $#to_watch; $n++) { - $evalarg = $to_watch[$n]; - local $onetimeDump; # Do not output results - my ($val) = &eval; # Fix context (&eval is doing array)? - $val = ( (defined $val) ? "'$val'" : 'undef' ); - if ($val ne $old_watch[$n]) { - $signal = 1; - print $OUT < 30) { $position = "$prefix$line):\n$line:\t$dbline[$line]$after"; - $prefix = ""; - $infix = ":\t"; + $prefix = ""; + $infix = ":\t"; } else { - $infix = "):\t"; - $position = "$prefix$line$infix$dbline[$line]$after"; + $infix = "):\t"; + $position = "$prefix$line$infix$dbline[$line]$after"; } if ($frame) { - print $LINEINFO ' ' x $stack_depth, "$line:\t$dbline[$line]$after"; + print_lineinfo(' ' x $stack_depth, "$line:\t$dbline[$line]$after"); } else { - print $LINEINFO $position; + print_lineinfo($position); } for ($i = $line + 1; $i <= $max && $dbline[$i] == 0; ++$i) { #{ vi - last if $dbline[$i] =~ /^\s*[\;\}\#\n]/; - last if $signal; - $after = ($dbline[$i] =~ /\n$/ ? '' : "\n"); - $incr_pos = "$prefix$i$infix$dbline[$i]$after"; - $position .= $incr_pos; - if ($frame) { - print $LINEINFO ' ' x $stack_depth, "$i:\t$dbline[$i]$after"; - } else { - print $LINEINFO $incr_pos; - } + last if $dbline[$i] =~ /^\s*[\;\}\#\n]/; + last if $signal; + $after = ($dbline[$i] =~ /\n$/ ? '' : "\n"); + $incr_pos = "$prefix$i$infix$dbline[$i]$after"; + $position .= $incr_pos; + if ($frame) { + print_lineinfo(' ' x $stack_depth, "$i:\t$dbline[$i]$after"); + } else { + print_lineinfo($incr_pos); + } } } } $evalarg = $action, &eval if $action; if ($single || $was_signal) { - local $level = $level + 1; - foreach $evalarg (@$pre) { - &eval; - } - print $OUT $stack_depth . " levels deep in subroutine calls!\n" - if $single & 4; - $start = $line; - $incr = -1; # for backward motion. - @typeahead = (@$pretype, @typeahead); - CMD: + local $level = $level + 1; + foreach $evalarg (@$pre) { + &eval; + } + print $OUT $stack_depth . " levels deep in subroutine calls!\n" + if $single & 4; + $start = $line; + $incr = -1; # for backward motion. + @typeahead = (@$pretype, @typeahead); + CMD: while (($term || &setterm), - ($term_pid == $$ or &resetterm), - defined ($cmd=&readline(" DB" . ('<' x $level) . - ($#hist+1) . ('>' x $level) . - " "))) { + ($term_pid == $$ or resetterm(1)), + defined ($cmd=&readline("$pidprompt DB" . ('<' x $level) . + ($#hist+1) . ('>' x $level) . " "))) + { $single = 0; $signal = 0; $cmd =~ s/\\$/\n/ && do { @@ -510,40 +784,41 @@ EOP $cmd =~ /^$/ && ($cmd = $laststep); push(@hist,$cmd) if length($cmd) > 1; PIPE: { + $cmd =~ s/^\s+//s; # trim annoying leading whitespace + $cmd =~ s/\s+$//s; # trim annoying trailing whitespace ($i) = split(/\s+/,$cmd); - eval "\$cmd =~ $alias{$i}", print $OUT $@ if $alias{$i}; - $cmd =~ /^q$/ && ($exiting = 1) && exit 0; - $cmd =~ /^h$/ && do { - print_help($help); - next CMD; }; - $cmd =~ /^h\s+h$/ && do { - print_help($summary); - next CMD; }; - $cmd =~ /^h\s+(\S)$/ && do { - my $asked = "\Q$1"; - if ($help =~ /^(?:[IB]<)$asked/m) { - while ($help =~ /^((?:[IB]<)$asked([\s\S]*?)\n)(?!\s)/mg) { - print_help($1); - } - } else { - print_help("B<$asked> is not a debugger command.\n"); - } - next CMD; }; + if ($alias{$i}) { + # squelch the sigmangler + local $SIG{__DIE__}; + local $SIG{__WARN__}; + eval "\$cmd =~ $alias{$i}"; + if ($@) { + local $\ = ''; + print $OUT "Couldn't evaluate `$i' alias: $@"; + next CMD; + } + } + $cmd =~ /^q$/ && do { + $fall_off_end = 1; + clean_ENV(); + exit $?; + }; $cmd =~ /^t$/ && do { $trace ^= 1; + local $\ = ''; print $OUT "Trace = " . (($trace & 1) ? "on" : "off" ) . "\n"; next CMD; }; $cmd =~ /^S(\s+(!)?(.+))?$/ && do { $Srev = defined $2; $Spatt = $3; $Snocheck = ! defined $1; + local $\ = ''; + local $, = ''; foreach $subname (sort(keys %sub)) { if ($Snocheck or $Srev^($subname =~ /$Spatt/)) { print $OUT $subname,"\n"; } } next CMD; }; - $cmd =~ /^v$/ && do { - list_versions(); next CMD}; $cmd =~ s/^X\b/V $package/; $cmd =~ /^V$/ && do { $cmd = "V $package"; }; @@ -555,14 +830,26 @@ EOP if (defined &main::dumpvar) { local $frame = 0; local $doret = -2; - &main::dumpvar($packname,@vars); + # must detect sigpipe failures + eval { &main::dumpvar($packname, + defined $option{dumpDepth} + ? $option{dumpDepth} : -1, + @vars) }; + if ($@) { + die unless $@ =~ /dumpvar print failed/; + } } else { print $OUT "dumpvar.pl not available.\n"; } select ($savout); next CMD; }; $cmd =~ s/^x\b/ / && do { # So that will be evaled - $onetimeDump = 'dump'; }; + $onetimeDump = 'dump'; + # handle special "x 3 blah" syntax + if ($cmd =~ s/^\s*(\d+)(?=\s)/ /) { + $onetimedumpDepth = $1; + } + }; $cmd =~ s/^m\s+([\w:]+)\s*$/ / && do { methods($1); next CMD}; $cmd =~ s/^m\b/ / && do { # So this will be evaled @@ -571,7 +858,7 @@ EOP $file = $1; $file =~ s/\s+$//; if (!$file) { - print $OUT "The old f command is now the r command.\n"; + print $OUT "The old f command is now the r command.\n"; # hint print $OUT "The new f command switches filenames.\n"; next CMD; } @@ -596,306 +883,125 @@ EOP next CMD; } }; - $cmd =~ s/^l\s+-\s*$/-/; - $cmd =~ /^([lb])\b\s*(\$.*)/s && do { - $evalarg = $2; - my ($s) = &eval; - print($OUT "Error: $@\n"), next CMD if $@; - $s = CvGV_name($s); - print($OUT "Interpreted as: $1 $s\n"); - $cmd = "$1 $s"; - }; - $cmd =~ /^l\b\s*([\':A-Za-z_][\':\w]*(\[.*\])?)/s && do { - $subname = $1; - $subname =~ s/\'/::/; - $subname = $package."::".$subname - unless $subname =~ /::/; - $subname = "main".$subname if substr($subname,0,2) eq "::"; - @pieces = split(/:/,find_sub($subname) || $sub{$subname}); - $subrange = pop @pieces; - $file = join(':', @pieces); - if ($file ne $filename) { - print $OUT "Switching to file '$file'.\n" - unless $emacs; - *dbline = $main::{'_<' . $file}; - $max = $#dbline; - $filename = $file; - } - if ($subrange) { - if (eval($subrange) < -$window) { - $subrange =~ s/-.*/+/; - } - $cmd = "l $subrange"; - } else { - print $OUT "Subroutine $subname not found.\n"; - next CMD; - } }; $cmd =~ /^\.$/ && do { $incr = -1; # for backward motion. $start = $line; $filename = $filename_ini; *dbline = $main::{'_<' . $filename}; $max = $#dbline; - print $LINEINFO $position; + print_lineinfo($position); next CMD }; - $cmd =~ /^w\b\s*(\d*)$/ && do { - $incr = $window - 1; - $start = $1 if $1; - $start -= $preview; - #print $OUT 'l ' . $start . '-' . ($start + $incr); - $cmd = 'l ' . $start . '-' . ($start + $incr); }; $cmd =~ /^-$/ && do { $start -= $incr + $window + 1; $start = 1 if $start <= 0; $incr = $window - 1; $cmd = 'l ' . ($start) . '+'; }; - $cmd =~ /^l$/ && do { - $incr = $window - 1; - $cmd = 'l ' . $start . '-' . ($start + $incr); }; - $cmd =~ /^l\b\s*(\d*)\+(\d*)$/ && do { - $start = $1 if $1; - $incr = $2; - $incr = $window - 1 unless $incr; - $cmd = 'l ' . $start . '-' . ($start + $incr); }; - $cmd =~ /^l\b\s*((-?[\d\$\.]+)([-,]([\d\$\.]+))?)?/ && do { - $end = (!defined $2) ? $max : ($4 ? $4 : $2); - $end = $max if $end > $max; - $i = $2; - $i = $line if $i eq '.'; - $i = 1 if $i < 1; - $incr = $end - $i; - if ($emacs) { - print $OUT "\032\032$filename:$i:0\n"; - $i = $end; - } else { - for (; $i <= $end; $i++) { - ($stop,$action) = split(/\0/, $dbline{$i}); - $arrow = ($i==$line - and $filename eq $filename_ini) - ? '==>' - : ($dbline[$i]+0 ? ':' : ' ') ; - $arrow .= 'b' if $stop; - $arrow .= 'a' if $action; - print $OUT "$i$arrow\t", $dbline[$i]; - $i++, last if $signal; - } - print $OUT "\n" unless $dbline[$i-1] =~ /\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"; - my $file; - for $file (keys %had_breakpoints) { - local *dbline = $main::{'_<' . $file}; - my $max = $#dbline; - my $was; - - for ($i = 1; $i <= $max ; $i++) { - if (defined $dbline{$i}) { - $dbline{$i} =~ s/^[^\0]+//; - if ($dbline{$i} =~ s/^\0?$//) { - delete $dbline{$i}; - } - } - } - - if (not $had_breakpoints{$file} &= ~1) { - delete $had_breakpoints{$file}; - } - } - undef %postponed; - undef %postponed_file; - undef %break_on_load; - next CMD; }; - $cmd =~ /^L$/ && do { - my $file; - for $file (keys %had_breakpoints) { - local *dbline = $main::{'_<' . $file}; - my $max = $#dbline; - my $was; - - for ($i = 1; $i <= $max; $i++) { - if (defined $dbline{$i}) { - print $OUT "$file:\n" unless $was++; - print $OUT " $i:\t", $dbline[$i]; - ($stop,$action) = split(/\0/, $dbline{$i}); - print $OUT " break if (", $stop, ")\n" - if $stop; - print $OUT " action: ", $action, "\n" - if $action; - last if $signal; - } - } - } - if (%postponed) { - print $OUT "Postponed breakpoints in subroutines:\n"; - my $subname; - for $subname (keys %postponed) { - print $OUT " $subname\t$postponed{$subname}\n"; - last if $signal; - } - } - my @have = map { # Combined keys - keys %{$postponed_file{$_}} - } keys %postponed_file; - if (@have) { - print $OUT "Postponed breakpoints in files:\n"; - my ($file, $line); - for $file (keys %postponed_file) { - my $db = $postponed_file{$file}; - print $OUT " $file:\n"; - for $line (sort {$a <=> $b} keys %$db) { - print $OUT " $line:\n"; - my ($stop,$action) = split(/\0/, $$db{$line}); - print $OUT " break if (", $stop, ")\n" - if $stop; - print $OUT " action: ", $action, "\n" - if $action; - last if $signal; - } - last if $signal; - } - } - if (%break_on_load) { - print $OUT "Breakpoints on load:\n"; - my $file; - for $file (keys %break_on_load) { - print $OUT " $file\n"; - last if $signal; - } - } - if ($trace & 2) { - print $OUT "Watch-expressions:\n"; - my $expr; - for $expr (@to_watch) { - print $OUT " $expr\n"; - last if $signal; - } - } - next CMD; }; - $cmd =~ /^b\b\s*load\b\s*(.*)/ && do { - my $file = $1; $file =~ s/\s+$//; - { - $break_on_load{$file} = 1; - $break_on_load{$::INC{$file}} = 1 if $::INC{$file}; - $file .= '.pm', redo unless $file =~ /\./; - } - $had_breakpoints{$file} |= 1; - print $OUT "Will stop on load of `@{[join '\', `', sort keys %break_on_load]}'.\n"; - next CMD; }; - $cmd =~ /^b\b\s*(postpone|compile)\b\s*([':A-Za-z_][':\w]*)\s*(.*)/ && do { - my $cond = $3 || '1'; - my ($subname, $break) = ($2, $1 eq 'postpone'); - $subname =~ s/\'/::/; - $subname = "${'package'}::" . $subname - unless $subname =~ /::/; - $subname = "main".$subname if substr($subname,0,2) eq "::"; - $postponed{$subname} = $break - ? "break +0 if $cond" : "compile"; - next CMD; }; - $cmd =~ /^b\b\s*([':A-Za-z_][':\w]*(?:\[.*\])?)\s*(.*)/ && do { - $subname = $1; - $cond = $2 || '1'; - $subname =~ s/\'/::/; - $subname = "${'package'}::" . $subname - unless $subname =~ /::/; - $subname = "main".$subname if substr($subname,0,2) eq "::"; - # Filename below can contain ':' - ($file,$i) = (find_sub($subname) =~ /^(.*):(.*)$/); - $i += 0; - if ($i) { - local $filename = $file; - local *dbline = $main::{'_<' . $filename}; - $had_breakpoints{$filename} |= 1; - $max = $#dbline; - ++$i while $dbline[$i] == 0 && $i < $max; - $dbline{$i} =~ s/^[^\0]*/$cond/; - } else { - print $OUT "Subroutine $subname not found.\n"; - } - next CMD; }; - $cmd =~ /^b\b\s*(\d*)\s*(.*)/ && do { - $i = $1 || $line; - $cond = $2 || '1'; - if ($dbline[$i] == 0) { - print $OUT "Line $i not breakable.\n"; - } else { - $had_breakpoints{$filename} |= 1; - $dbline{$i} =~ s/^[^\0]*/$cond/; - } - next CMD; }; - $cmd =~ /^d\b\s*(\d*)/ && do { - $i = $1 || $line; - $dbline{$i} =~ s/^[^\0]*//; - delete $dbline{$i} if $dbline{$i} eq ''; - next CMD; }; - $cmd =~ /^A$/ && do { - print $OUT "Deleting all actions...\n"; - my $file; - for $file (keys %had_breakpoints) { - local *dbline = $main::{'_<' . $file}; - my $max = $#dbline; - my $was; - - for ($i = 1; $i <= $max ; $i++) { - if (defined $dbline{$i}) { - $dbline{$i} =~ s/\0[^\0]*//; - delete $dbline{$i} if $dbline{$i} eq ''; - } - } - - if (not $had_breakpoints{$file} &= ~2) { - delete $had_breakpoints{$file}; - } - } - next CMD; }; - $cmd =~ /^O\s*$/ && do { - for (@options) { - &dump_option($_); - } - next CMD; }; - $cmd =~ /^O\s*(\S.*)/ && do { - parse_options($1); - next CMD; }; - $cmd =~ /^\<\<\s*(.*)/ && do { # \<\< for CPerl sake: not HERE + # rjsf -> + $cmd =~ /^([aAbBhlLMoOvwW])\b\s*(.*)/s && do { + &cmd_wrapper($1, $2, $line); + next CMD; + }; + # <- rjsf + $cmd =~ /^\<\<\s*(.*)/ && do { # \<\< for CPerl sake: not HERE push @$pre, action($1); next CMD; }; $cmd =~ /^>>\s*(.*)/ && do { push @$post, action($1); next CMD; }; $cmd =~ /^<\s*(.*)/ && do { - $pre = [], next CMD unless $1; + unless ($1) { + print $OUT "All < actions cleared.\n"; + $pre = []; + next CMD; + } + if ($1 eq '?') { + unless (@$pre) { + print $OUT "No pre-prompt Perl actions.\n"; + next CMD; + } + print $OUT "Perl commands run before each prompt:\n"; + for my $action ( @$pre ) { + print $OUT "\t< -- $action\n"; + } + next CMD; + } $pre = [action($1)]; next CMD; }; $cmd =~ /^>\s*(.*)/ && do { - $post = [], next CMD unless $1; + unless ($1) { + print $OUT "All > actions cleared.\n"; + $post = []; + next CMD; + } + if ($1 eq '?') { + unless (@$post) { + print $OUT "No post-prompt Perl actions.\n"; + next CMD; + } + print $OUT "Perl commands run after each prompt:\n"; + for my $action ( @$post ) { + print $OUT "\t> -- $action\n"; + } + next CMD; + } $post = [action($1)]; next CMD; }; $cmd =~ /^\{\{\s*(.*)/ && do { + if ($cmd =~ /^\{.*\}$/ && unbalanced(substr($cmd,2))) { + print $OUT "{{ is now a debugger command\n", + "use `;{{' if you mean Perl code\n"; + $cmd = "h {{"; + redo CMD; + } push @$pretype, $1; next CMD; }; $cmd =~ /^\{\s*(.*)/ && do { - $pretype = [], next CMD unless $1; - $pretype = [$1]; - next CMD; }; - $cmd =~ /^a\b\s*(\d*)\s*(.*)/ && do { - $i = $1 || $line; $j = $2; - if (length $j) { - if ($dbline[$i] == 0) { - print $OUT "Line $i may not have an action.\n"; - } else { - $had_breakpoints{$filename} |= 2; - $dbline{$i} =~ s/\0[^\0]*//; - $dbline{$i} .= "\0" . action($j); - } - } else { - $dbline{$i} =~ s/\0[^\0]*//; - delete $dbline{$i} if $dbline{$i} eq ''; + unless ($1) { + print $OUT "All { actions cleared.\n"; + $pretype = []; + next CMD; } + if ($1 eq '?') { + unless (@$pretype) { + print $OUT "No pre-prompt debugger actions.\n"; + next CMD; + } + print $OUT "Debugger commands run before each prompt:\n"; + for my $action ( @$pretype ) { + print $OUT "\t{ -- $action\n"; + } + next CMD; + } + if ($cmd =~ /^\{.*\}$/ && unbalanced(substr($cmd,1))) { + print $OUT "{ is now a debugger command\n", + "use `;{' if you mean Perl code\n"; + $cmd = "h {"; + redo CMD; + } + $pretype = [$1]; next CMD; }; - $cmd =~ /^n$/ && do { + $cmd =~ /^y(?:\s+(\d*)\s*(.*))?$/ && do { + eval { require PadWalker; PadWalker->VERSION(0.08) } + or &warn($@ =~ /locate/ + ? "PadWalker module not found - please install\n" + : $@) + and next CMD; + do 'dumpvar.pl' unless defined &main::dumpvar; + defined &main::dumpvar + or print $OUT "dumpvar.pl not available.\n" + and next CMD; + my @vars = split(' ', $2 || ''); + my $h = eval { PadWalker::peek_my(($1 || 0) + 1) }; + $@ and $@ =~ s/ at .*//, &warn($@), next CMD; + my $savout = select($OUT); + dumpvar::dumplex($_, $h->{$_}, + defined $option{dumpDepth} + ? $option{dumpDepth} : -1, + @vars) + for sort keys %$h; + select($savout); + next CMD; }; + $cmd =~ /^n$/ && do { end_report(), next CMD if $finished and $level <= 1; $single = 2; $laststep = $cmd; @@ -912,7 +1018,7 @@ EOP # sub-session anyway... # local $filename = $filename; # local *dbline = *dbline; # XXX Would this work?! - if ($i =~ /\D/) { # subroutine name + if ($subname =~ /\D/) { # subroutine name $subname = $package."::".$subname unless $subname =~ /::/; ($file,$i) = (find_sub($subname) =~ /^(.*):(.*)$/); @@ -953,11 +1059,12 @@ EOP for (@ini_INC) { push @flags, '-I', $_; } + push @flags, '-T' if ${^TAINT}; # 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'}[$_]); + chomp ($cl = ${'::_<-e'}[$_]); push @script, '-e', $cl; } } else { @@ -976,7 +1083,7 @@ EOP *dbline = $main::{'_<' . $file}; next unless %dbline or $postponed_file{$file}; (push @hard, $file), next - if $file =~ /^\(eval \d+\)$/; + if $file =~ /^\(\w*eval/; my @add; @add = %{$postponed_file{$file}} if $postponed_file{$file}; @@ -1021,29 +1128,24 @@ EOP set_list("PERLDB_POST", @$post); set_list("PERLDB_TYPEAHEAD", @typeahead); $ENV{PERLDB_RESTART} = 1; - #print "$^X, '-d', @flags, @script, ($emacs ? '-emacs' : ()), @ARGS"; - exec $^X, '-d', @flags, @script, ($emacs ? '-emacs' : ()), @ARGS; + delete $ENV{PERLDB_PIDS}; # Restore ini state + $ENV{PERLDB_PIDS} = $ini_pids if defined $ini_pids; + #print "$^X, '-d', @flags, @script, ($slave_editor ? '-emacs' : ()), @ARGS"; + exec($^X, '-d', @flags, @script, ($slave_editor ? '-emacs' : ()), @ARGS) || print $OUT "exec failed: $!\n"; last CMD; }; $cmd =~ /^T$/ && do { print_trace($OUT, 1); # skip DB next CMD; }; - $cmd =~ /^W\s*$/ && do { - $trace &= ~2; - @to_watch = @old_watch = (); - next CMD; }; - $cmd =~ /^W\b\s*(.*)/s && do { - push @to_watch, $1; - $evalarg = $1; - my ($val) = &eval; - $val = (defined $val) ? "'$val'" : 'undef' ; - push @old_watch, $val; - $trace |= 2; - next CMD; }; + $cmd =~ /^w\b\s*(.*)/s && do { &cmd_w($1); next CMD; }; + $cmd =~ /^W\b\s*(.*)/s && do { &cmd_W($1); next CMD; }; $cmd =~ /^\/(.*)$/ && do { $inpat = $1; $inpat =~ s:([^\\])/$:$1:; if ($inpat ne "") { + # squelch the sigmangler + local $SIG{__DIE__}; + local $SIG{__WARN__}; eval '$inpat =~ m'."\a$inpat\a"; if ($@ ne "") { print $OUT "$@"; @@ -1059,7 +1161,7 @@ EOP $start = 1 if ($start > $max); last if ($start == $end); if ($dbline[$start] =~ m' . "\a$pat\a" . 'i) { - if ($emacs) { + if ($slave_editor) { print $OUT "\032\032$filename:$start:0\n"; } else { print $OUT "$start:\t", $dbline[$start], "\n"; @@ -1073,9 +1175,12 @@ EOP $inpat = $1; $inpat =~ s:([^\\])\?$:$1:; if ($inpat ne "") { + # squelch the sigmangler + local $SIG{__DIE__}; + local $SIG{__WARN__}; eval '$inpat =~ m'."\a$inpat\a"; if ($@ ne "") { - print $OUT "$@"; + print $OUT $@; next CMD; } $pat = $inpat; @@ -1088,7 +1193,7 @@ EOP $start = $max if ($start <= 0); last if ($start == $end); if ($dbline[$start] =~ m' . "\a$pat\a" . 'i) { - if ($emacs) { + if ($slave_editor) { print $OUT "\032\032$filename:$start:0\n"; } else { print $OUT "$start:\t", $dbline[$start], "\n"; @@ -1124,32 +1229,62 @@ EOP &system($ENV{SHELL}||"/bin/sh"); next CMD; }; $cmd =~ /^$sh\s*([\x00-\xff]*)/ && do { + # XXX: using csh or tcsh destroys sigint retvals! + #&system($1); # use this instead &system($ENV{SHELL}||"/bin/sh","-c",$1); next CMD; }; $cmd =~ /^H\b\s*(-(\d+))?/ && do { - $end = $2?($#hist-$2):0; + $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; }; + $cmd =~ /^(?:man|(?:perl)?doc)\b(?:\s+([^(]*))?$/ && do { + runman($1); + 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 { + $cmd =~ s/^=\s*// && do { + my @keys; + if (length $cmd == 0) { + @keys = sort keys %alias; + } elsif (my($k,$v) = ($cmd =~ /^(\S+)\s+(\S.*)/)) { + # can't use $_ or kill //g state + for my $x ($k, $v) { $x =~ s/\a/\\a/g } + $alias{$k} = "s\a$k\a$v\a"; + # squelch the sigmangler + local $SIG{__DIE__}; + local $SIG{__WARN__}; + unless (eval "sub { s\a$k\a$v\a }; 1") { + print $OUT "Can't alias $k to $v: $@\n"; + delete $alias{$k}; + next CMD; + } + @keys = ($k); + } else { + @keys = ($cmd); + } + for my $k (@keys) { + if ((my $v = $alias{$k}) =~ ss\a$k\a(.*)\a$1) { + print $OUT "$k\t= $1\n"; + } + elsif (defined $alias{$k}) { print $OUT "$k\t$alias{$k}\n"; - }; - }; - }; + } + else { + print "No alias for $k\n"; + } + } next CMD; }; + $cmd =~ /^source\s+(.*\S)/ && do { + if (open my $fh, $1) { + push @cmdfhs, $fh; + } else { + &warn("Can't execute `$1': $!\n"); + } + next CMD; }; $cmd =~ /^\|\|?\s*[^|]/ && do { if ($pager =~ /^\|/) { open(SAVEOUT,">&STDOUT") || &warn("Can't save STDOUT"); @@ -1157,25 +1292,29 @@ EOP } else { open(SAVEOUT,">&OUT") || &warn("Can't save DB::OUT"); } + fix_less(); unless ($piped=open(OUT,$pager)) { &warn("Can't pipe output to `$pager'"); if ($pager =~ /^\|/) { - open(OUT,">&STDOUT") || &warn("Can't restore DB::OUT"); + open(OUT,">&STDOUT") # XXX: lost message + || &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"); + open(OUT,">&STDOUT") # XXX: lost message + || &warn("Can't restore DB::OUT"); } next CMD; } $SIG{PIPE}= \&DB::catch if $pager =~ /^\|/ - && "" eq $SIG{PIPE} || "DEFAULT" eq $SIG{PIPE}; + && ("" eq $SIG{PIPE} || "DEFAULT" eq $SIG{PIPE}); $selected= select(OUT); $|= 1; select( $selected ), $selected= "" unless $cmd =~ /^\|\|/; $cmd =~ s/^\|+\s*//; - redo PIPE; }; + 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'}; @@ -1184,20 +1323,34 @@ EOP $evalarg = "\$^D = \$^D | \$DB::db_stop;\n$cmd"; &eval; if ($onetimeDump) { $onetimeDump = undef; + $onetimedumpDepth = undef; } elsif ($term_pid == $$) { print $OUT "\n"; } } continue { # CMD: if ($piped) { if ($pager =~ /^\|/) { - $?= 0; close(OUT) || &warn("Can't close DB::OUT"); - &warn( "Pager `$pager' failed: ", - ($?>>8) > 128 ? ($?>>8)-256 : ($?>>8), - ( $? & 128 ) ? " (core dumped)" : "", - ( $? & 127 ) ? " (SIG ".($?&127).")" : "", "\n" ) if $?; + $? = 0; + # we cannot warn here: the handle is missing --tchrist + close(OUT) || print SAVEOUT "\nCan't close DB::OUT\n"; + + # most of the $? crud was coping with broken cshisms + if ($?) { + print SAVEOUT "Pager `$pager' failed: "; + if ($? == -1) { + print SAVEOUT "shell returned -1\n"; + } elsif ($? >> 8) { + print SAVEOUT + ( $? & 127 ) ? " (SIG#".($?&127).")" : "", + ( $? & 128 ) ? " -- core dumped" : "", "\n"; + } else { + print SAVEOUT "status ", ($? >> 8), "\n"; + } + } + 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; + $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 { @@ -1208,7 +1361,7 @@ EOP $piped= ""; } } # CMD: - $exiting = 1 unless defined $cmd; + $fall_off_end = 1 unless defined $cmd; # Emulate `q' on EOF foreach $evalarg (@$post) { &eval; } @@ -1231,18 +1384,19 @@ sub sub { $single &= 1; $single |= 4 if $stack_depth == $deep; ($frame & 4 - ? ( (print $LINEINFO ' ' x ($stack_depth - 1), "in "), + ? ( print_lineinfo(' ' x ($stack_depth - 1), "in "), # Why -1? But it works! :-( print_trace($LINEINFO, -1, 1, 1, "$sub$al") ) - : print $LINEINFO ' ' x ($stack_depth - 1), "entering $sub$al\n") if $frame; + : print_lineinfo(' ' x ($stack_depth - 1), "entering $sub$al\n")) if $frame; if (wantarray) { @ret = &$sub; $single |= $stack[$stack_depth--]; ($frame & 4 - ? ( (print $LINEINFO ' ' x $stack_depth, "out "), + ? ( print_lineinfo(' ' x $stack_depth, "out "), print_trace($LINEINFO, -1, 1, 1, "$sub$al") ) - : print $LINEINFO ' ' x $stack_depth, "exited $sub$al\n") if $frame & 2; + : print_lineinfo(' ' x $stack_depth, "exited $sub$al\n")) if $frame & 2; if ($doret eq $stack_depth or $frame & 16) { + local $\ = ''; my $fh = ($doret eq $stack_depth ? $OUT : $LINEINFO); print $fh ' ' x $stack_depth if $frame & 16; print $fh "list context return from $sub:\n"; @@ -1258,10 +1412,11 @@ sub sub { }; $single |= $stack[$stack_depth--]; ($frame & 4 - ? ( (print $LINEINFO ' ' x $stack_depth, "out "), + ? ( print_lineinfo(' ' x $stack_depth, "out "), print_trace($LINEINFO, -1, 1, 1, "$sub$al") ) - : print $LINEINFO ' ' x $stack_depth, "exited $sub$al\n") if $frame & 2; + : print_lineinfo(' ' x $stack_depth, "exited $sub$al\n")) if $frame & 2; if ($doret eq $stack_depth or $frame & 16 and defined wantarray) { + local $\ = ''; my $fh = ($doret eq $stack_depth ? $OUT : $LINEINFO); print $fh (' ' x $stack_depth) if $frame & 16; print $fh (defined wantarray @@ -1270,41 +1425,559 @@ sub sub { dumpit( $fh, $ret ) if defined wantarray; $doret = -2; } - $ret; - } + $ret; + } +} + +### The API section + +### Functions with multiple modes of failure die on error, the rest +### returns FALSE on error. +### User-interface functions cmd_* output error message. + +### Note all cmd_[a-zA-Z]'s require $line, $dblineno as first arguments + +my %set = ( # + 'pre580' => { + 'a' => 'pre580_a', + 'A' => 'pre580_null', + 'b' => 'pre580_b', + 'B' => 'pre580_null', + 'd' => 'pre580_null', + 'D' => 'pre580_D', + 'h' => 'pre580_h', + 'M' => 'pre580_null', + 'O' => 'o', + 'o' => 'pre580_null', + 'v' => 'M', + 'w' => 'v', + 'W' => 'pre580_W', + }, +); + +sub cmd_wrapper { + my $cmd = shift; + my $line = shift; + my $dblineno = shift; + + # with this level of indirection we can wrap + # to old (pre580) or other command sets easily + # + my $call = 'cmd_'.( + $set{$CommandSet}{$cmd} || $cmd + ); + # print "cmd_wrapper($cmd): $CommandSet($set{$CommandSet}{$cmd}) => call($call)\n"; + + return &$call($line, $dblineno); +} + +sub cmd_a { + my $line = shift || ''; # [.|line] expr + my $dbline = shift; $line =~ s/^(\.|(?:[^\d]))/$dbline/; + if ($line =~ /^\s*(\d*)\s*(\S.+)/) { + my ($lineno, $expr) = ($1, $2); + if (length $expr) { + if ($dbline[$lineno] == 0) { + print $OUT "Line $lineno($dbline[$lineno]) does not have an action?\n"; + } else { + $had_breakpoints{$filename} |= 2; + $dbline{$lineno} =~ s/\0[^\0]*//; + $dbline{$lineno} .= "\0" . action($expr); + } + } + } else { + print $OUT "Adding an action requires an optional lineno and an expression\n"; # hint + } +} + +sub cmd_A { + my $line = shift || ''; + my $dbline = shift; $line =~ s/^\./$dbline/; + if ($line eq '*') { + eval { &delete_action(); 1 } or print $OUT $@ and return; + } elsif ($line =~ /^(\S.*)/) { + eval { &delete_action($1); 1 } or print $OUT $@ and return; + } else { + print $OUT "Deleting an action requires a line number, or '*' for all\n"; # hint + } +} + +sub delete_action { + my $i = shift; + if (defined($i)) { + die "Line $i has no action .\n" if $dbline[$i] == 0; + $dbline{$i} =~ s/\0[^\0]*//; # \^a + delete $dbline{$i} if $dbline{$i} eq ''; + } else { + print $OUT "Deleting all actions...\n"; + for my $file (keys %had_breakpoints) { + local *dbline = $main::{'_<' . $file}; + my $max = $#dbline; + my $was; + for ($i = 1; $i <= $max ; $i++) { + if (defined $dbline{$i}) { + $dbline{$i} =~ s/\0[^\0]*//; + delete $dbline{$i} if $dbline{$i} eq ''; + } + unless ($had_breakpoints{$file} &= ~2) { + delete $had_breakpoints{$file}; + } + } + } + } +} + +sub cmd_b { + my $line = shift; # [.|line] [cond] + my $dbline = shift; $line =~ s/^\./$dbline/; + if ($line =~ /^\s*$/) { + &cmd_b_line($dbline, 1); + } elsif ($line =~ /^load\b\s*(.*)/) { + my $file = $1; $file =~ s/\s+$//; + &cmd_b_load($file); + } elsif ($line =~ /^(postpone|compile)\b\s*([':A-Za-z_][':\w]*)\s*(.*)/) { + my $cond = length $3 ? $3 : '1'; + my ($subname, $break) = ($2, $1 eq 'postpone'); + $subname =~ s/\'/::/g; + $subname = "${'package'}::" . $subname unless $subname =~ /::/; + $subname = "main".$subname if substr($subname,0,2) eq "::"; + $postponed{$subname} = $break ? "break +0 if $cond" : "compile"; + } elsif ($line =~ /^([':A-Za-z_][':\w]*(?:\[.*\])?)\s*(.*)/) { + $subname = $1; + $cond = length $2 ? $2 : '1'; + &cmd_b_sub($subname, $cond); + } elsif ($line =~ /^(\d*)\s*(.*)/) { + $line = $1 || $dbline; + $cond = length $2 ? $2 : '1'; + &cmd_b_line($line, $cond); + } else { + print "confused by line($line)?\n"; + } +} + +sub break_on_load { + my $file = shift; + $break_on_load{$file} = 1; + $had_breakpoints{$file} |= 1; +} + +sub report_break_on_load { + sort keys %break_on_load; +} + +sub cmd_b_load { + my $file = shift; + my @files; + { + push @files, $file; + push @files, $::INC{$file} if $::INC{$file}; + $file .= '.pm', redo unless $file =~ /\./; + } + break_on_load($_) for @files; + @files = report_break_on_load; + local $\ = ''; + local $" = ' '; + print $OUT "Will stop on load of `@files'.\n"; +} + +$filename_error = ''; + +sub breakable_line { + my ($from, $to) = @_; + my $i = $from; + if (@_ >= 2) { + my $delta = $from < $to ? +1 : -1; + my $limit = $delta > 0 ? $#dbline : 1; + $limit = $to if ($limit - $to) * $delta > 0; + $i += $delta while $dbline[$i] == 0 and ($limit - $i) * $delta > 0; + } + return $i unless $dbline[$i] == 0; + my ($pl, $upto) = ('', ''); + ($pl, $upto) = ('s', "..$to") if @_ >=2 and $from != $to; + die "Line$pl $from$upto$filename_error not breakable\n"; +} + +sub breakable_line_in_filename { + my ($f) = shift; + local *dbline = $main::{'_<' . $f}; + local $filename_error = " of `$f'"; + breakable_line(@_); +} + +sub break_on_line { + my ($i, $cond) = @_; + $cond = 1 unless @_ >= 2; + my $inii = $i; + my $after = ''; + my $pl = ''; + die "Line $i$filename_error not breakable.\n" if $dbline[$i] == 0; + $had_breakpoints{$filename} |= 1; + if ($dbline{$i}) { $dbline{$i} =~ s/^[^\0]*/$cond/; } + else { $dbline{$i} = $cond; } +} + +sub cmd_b_line { + eval { break_on_line(@_); 1 } or do { + local $\ = ''; + print $OUT $@ and return; + }; +} + +sub break_on_filename_line { + my ($f, $i, $cond) = @_; + $cond = 1 unless @_ >= 3; + local *dbline = $main::{'_<' . $f}; + local $filename_error = " of `$f'"; + local $filename = $f; + break_on_line($i, $cond); +} + +sub break_on_filename_line_range { + my ($f, $from, $to, $cond) = @_; + my $i = breakable_line_in_filename($f, $from, $to); + $cond = 1 unless @_ >= 3; + break_on_filename_line($f,$i,$cond); +} + +sub subroutine_filename_lines { + my ($subname,$cond) = @_; + # Filename below can contain ':' + find_sub($subname) =~ /^(.*):(\d+)-(\d+)$/; +} + +sub break_subroutine { + my $subname = shift; + my ($file,$s,$e) = subroutine_filename_lines($subname) or + die "Subroutine $subname not found.\n"; + $cond = 1 unless @_ >= 2; + break_on_filename_line_range($file,$s,$e,@_); +} + +sub cmd_b_sub { + my ($subname,$cond) = @_; + $cond = 1 unless @_ >= 2; + unless (ref $subname eq 'CODE') { + $subname =~ s/\'/::/g; + my $s = $subname; + $subname = "${'package'}::" . $subname + unless $subname =~ /::/; + $subname = "CORE::GLOBAL::$s" + if not defined &$subname and $s !~ /::/ and defined &{"CORE::GLOBAL::$s"}; + $subname = "main".$subname if substr($subname,0,2) eq "::"; + } + eval { break_subroutine($subname,$cond); 1 } or do { + local $\ = ''; + print $OUT $@ and return; + } +} + +sub cmd_B { + my $line = ($_[0] =~ /^\./) ? $dbline : shift || ''; + my $dbline = shift; $line =~ s/^\./$dbline/; + if ($line eq '*') { + eval { &delete_breakpoint(); 1 } or print $OUT $@ and return; + } elsif ($line =~ /^(\S.*)/) { + eval { &delete_breakpoint($line || $dbline); 1 } or do { + local $\ = ''; + print $OUT $@ and return; + }; + } else { + print $OUT "Deleting a breakpoint requires a line number, or '*' for all\n"; # hint + } +} + +sub delete_breakpoint { + my $i = shift; + if (defined($i)) { + die "Line $i not breakable.\n" if $dbline[$i] == 0; + $dbline{$i} =~ s/^[^\0]*//; + delete $dbline{$i} if $dbline{$i} eq ''; + } else { + print $OUT "Deleting all breakpoints...\n"; + for my $file (keys %had_breakpoints) { + local *dbline = $main::{'_<' . $file}; + my $max = $#dbline; + my $was; + for ($i = 1; $i <= $max ; $i++) { + if (defined $dbline{$i}) { + $dbline{$i} =~ s/^[^\0]+//; + if ($dbline{$i} =~ s/^\0?$//) { + delete $dbline{$i}; + } + } + } + if (not $had_breakpoints{$file} &= ~1) { + delete $had_breakpoints{$file}; + } + } + undef %postponed; + undef %postponed_file; + undef %break_on_load; + } +} + +sub cmd_stop { # As on ^C, but not signal-safy. + $signal = 1; +} + +sub cmd_h { + my $line = shift || ''; + if ($line =~ /^h\s*/) { + print_help($help); + } elsif ($line =~ /^(\S.*)$/) { + # support long commands; otherwise bogus errors + # happen when you ask for h on for example + my $asked = $1; # for proper errmsg + my $qasked = quotemeta($asked); # for searching + # XXX: finds CR but not + if ($help =~ /^ is not a debugger command.\n"); + } + } else { + print_help($summary); + } +} + +sub cmd_l { + my $line = shift; + $line =~ s/^-\s*$/-/; + if ($line =~ /^(\$.*)/s) { + $evalarg = $2; + my ($s) = &eval; + print($OUT "Error: $@\n"), next CMD if $@; + $s = CvGV_name($s); + print($OUT "Interpreted as: $1 $s\n"); + $line = "$1 $s"; + &cmd_l($s); + } elsif ($line =~ /^([\':A-Za-z_][\':\w]*(\[.*\])?)/s) { + my $s = $subname = $1; + $subname =~ s/\'/::/; + $subname = $package."::".$subname + unless $subname =~ /::/; + $subname = "CORE::GLOBAL::$s" + if not defined &$subname and $s !~ /::/ + and defined &{"CORE::GLOBAL::$s"}; + $subname = "main".$subname if substr($subname,0,2) eq "::"; + @pieces = split(/:/,find_sub($subname) || $sub{$subname}); + $subrange = pop @pieces; + $file = join(':', @pieces); + if ($file ne $filename) { + print $OUT "Switching to file '$file'.\n" + unless $slave_editor; + *dbline = $main::{'_<' . $file}; + $max = $#dbline; + $filename = $file; + } + if ($subrange) { + if (eval($subrange) < -$window) { + $subrange =~ s/-.*/+/; + } + $line = $subrange; + &cmd_l($subrange); + } else { + print $OUT "Subroutine $subname not found.\n"; + } + } elsif ($line =~ /^\s*$/) { + $incr = $window - 1; + $line = $start . '-' . ($start + $incr); + &cmd_l($line); + } elsif ($line =~ /^(\d*)\+(\d*)$/) { + $start = $1 if $1; + $incr = $2; + $incr = $window - 1 unless $incr; + $line = $start . '-' . ($start + $incr); + &cmd_l($line); + } elsif ($line =~ /^((-?[\d\$\.]+)([-,]([\d\$\.]+))?)?/) { + $end = (!defined $2) ? $max : ($4 ? $4 : $2); + $end = $max if $end > $max; + $i = $2; + $i = $line if $i eq '.'; + $i = 1 if $i < 1; + $incr = $end - $i; + if ($slave_editor) { + print $OUT "\032\032$filename:$i:0\n"; + $i = $end; + } else { + for (; $i <= $end; $i++) { + my ($stop,$action); + ($stop,$action) = split(/\0/, $dbline{$i}) if + $dbline{$i}; + $arrow = ($i==$line + and $filename eq $filename_ini) + ? '==>' + : ($dbline[$i]+0 ? ':' : ' ') ; + $arrow .= 'b' if $stop; + $arrow .= 'a' if $action; + print $OUT "$i$arrow\t", $dbline[$i]; + $i++, last if $signal; + } + print $OUT "\n" unless $dbline[$i-1] =~ /\n$/; + } + $start = $i; # remember in case they want more + $start = $max if $start > $max; + } +} + +sub cmd_L { + my $arg = shift || 'abw'; $arg = 'abw' unless $CommandSet eq '580'; # sigh... + my $action_wanted = ($arg =~ /a/) ? 1 : 0; + my $break_wanted = ($arg =~ /b/) ? 1 : 0; + my $watch_wanted = ($arg =~ /w/) ? 1 : 0; + + if ($break_wanted or $action_wanted) { + for my $file (keys %had_breakpoints) { + local *dbline = $main::{'_<' . $file}; + my $max = $#dbline; + my $was; + for ($i = 1; $i <= $max; $i++) { + if (defined $dbline{$i}) { + print $OUT "$file:\n" unless $was++; + print $OUT " $i:\t", $dbline[$i]; + ($stop,$action) = split(/\0/, $dbline{$i}); + print $OUT " break if (", $stop, ")\n" + if $stop and $break_wanted; + print $OUT " action: ", $action, "\n" + if $action and $action_wanted; + last if $signal; + } + } + } + } + if (%postponed and $break_wanted) { + print $OUT "Postponed breakpoints in subroutines:\n"; + my $subname; + for $subname (keys %postponed) { + print $OUT " $subname\t$postponed{$subname}\n"; + last if $signal; + } + } + my @have = map { # Combined keys + keys %{$postponed_file{$_}} + } keys %postponed_file; + if (@have and ($break_wanted or $action_wanted)) { + print $OUT "Postponed breakpoints in files:\n"; + my ($file, $line); + for $file (keys %postponed_file) { + my $db = $postponed_file{$file}; + print $OUT " $file:\n"; + for $line (sort {$a <=> $b} keys %$db) { + print $OUT " $line:\n"; + my ($stop,$action) = split(/\0/, $$db{$line}); + print $OUT " break if (", $stop, ")\n" + if $stop and $break_wanted; + print $OUT " action: ", $action, "\n" + if $action and $action_wanted; + last if $signal; + } + last if $signal; + } + } + if (%break_on_load and $break_wanted) { + print $OUT "Breakpoints on load:\n"; + my $file; + for $file (keys %break_on_load) { + print $OUT " $file\n"; + last if $signal; + } + } + if ($watch_wanted) { + if ($trace & 2) { + print $OUT "Watch-expressions:\n" if @to_watch; + for my $expr (@to_watch) { + print $OUT " $expr\n"; + last if $signal; + } + } + } +} + +sub cmd_M { + &list_modules(); +} + +sub cmd_o { + my $opt = shift || ''; # opt[=val] + if ($opt =~ /^(\S.*)/) { + &parse_options($1); + } else { + for (@options) { + &dump_option($_); + } + } +} + +sub cmd_O { + print $OUT "The old O command is now the o command.\n"; # hint + print $OUT "Use 'h' to get current command help synopsis or\n"; # + print $OUT "use 'o CommandSet=pre580' to revert to old usage\n"; # +} + +sub cmd_v { + my $line = shift; + + if ($line =~ /^(\d*)$/) { + $incr = $window - 1; + $start = $1 if $1; + $start -= $preview; + $line = $start . '-' . ($start + $incr); + &cmd_l($line); + } +} + +sub cmd_w { + my $expr = shift || ''; + if ($expr =~ /^(\S.*)/) { + push @to_watch, $expr; + $evalarg = $expr; + my ($val) = &eval; + $val = (defined $val) ? "'$val'" : 'undef' ; + push @old_watch, $val; + $trace |= 2; + } else { + print $OUT "Adding a watch-expression requires an expression\n"; # hint + } +} + +sub cmd_W { + my $expr = shift || ''; + if ($expr eq '*') { + $trace &= ~2; + print $OUT "Deleting all watch expressions ...\n"; + @to_watch = @old_watch = (); + } elsif ($expr =~ /^(\S.*)/) { + my $i_cnt = 0; + foreach (@to_watch) { + my $val = $to_watch[$i_cnt]; + if ($val eq $expr) { # =~ m/^\Q$i$/) { + splice(@to_watch, $i_cnt, 1); + } + $i_cnt++; + } + } else { + print $OUT "Deleting a watch-expression requires an expression, or '*' for all\n"; # hint + } } +### END of the API section + sub save { @saved = ($@, $!, $^E, $,, $/, $\, $^W); $, = ""; $/ = "\n"; $\ = ""; $^W = 0; } -# The following takes its argument via $evalarg to preserve current @_ - -sub eval { - local @res; # 'my' would make it visible from user code - { - local $otrace = $trace; - local $osingle = $single; - local $od = $^D; - @res = eval "$usercontext $evalarg;\n"; # '\n' for nice recursive debug - $trace = $otrace; - $single = $osingle; - $^D = $od; - } - my $at = $@; - local $saved[0]; # Preserve the old value of $@ - eval { &DB::save }; - if ($at) { - print $OUT $at; - } elsif ($onetimeDump eq 'dump') { - dumpit($OUT, \@res); - } elsif ($onetimeDump eq 'methods') { - methods($res[0]); - } - @res; +sub print_lineinfo { + resetterm(1) if $LINEINFO eq $OUT and $term_pid != $$; + local $\ = ''; + local $, = ''; + print $LINEINFO @_; } +# The following takes its argument via $evalarg to preserve current @_ + sub postponed_sub { my $subname = shift; if ($postponed{$subname} =~ s/^break\s([+-]?\d+)\s+if\s//) { @@ -1320,6 +1993,7 @@ sub postponed_sub { ++$i until $dbline[$i] != 0 or $i >= $max; $dbline{$i} = delete $postponed{$subname}; } else { + local $\ = ''; print $OUT "Subroutine $subname not found.\n"; } return; @@ -1339,15 +2013,16 @@ sub postponed { local *dbline = shift; my $filename = $dbline; $filename =~ s/^_ [^{}] + ) # Non-parens without backtracking + | + (??{ $balanced_brace_re }) # Group with matching parens + ) * + \} $ + }x; + return $_[0] !~ m/$balanced_brace_re/; +} + sub gets { - local($.); - #; &readline("cont: "); } sub system { # We save, change, then restore STDIN and STDOUT to avoid fork() since - # many non-Unix systems can do system() but have problems with fork(). + # some non-Unix systems can do system() but have problems with fork(). open(SAVEIN,"<&STDIN") || &warn("Can't save STDIN"); open(SAVEOUT,">&STDOUT") || &warn("Can't save STDOUT"); open(STDIN,"<&IN") || &warn("Can't redirect STDIN"); open(STDOUT,">&OUT") || &warn("Can't redirect STDOUT"); + + # XXX: using csh or tcsh destroys sigint retvals! system(@_); open(STDIN,"<&SAVEIN") || &warn("Can't restore STDIN"); open(STDOUT,">&SAVEOUT") || &warn("Can't restore STDOUT"); - close(SAVEIN); close(SAVEOUT); - &warn( "(Command returned ", ($?>>8) > 128 ? ($?>>8)-256 : ($?>>8), ")", - ( $? & 128 ) ? " (core dumped)" : "", - ( $? & 127 ) ? " (SIG ".($?&127).")" : "", "\n" ) if $?; - $?; + close(SAVEIN); + close(SAVEOUT); + + + # most of the $? crud was coping with broken cshisms + if ($? >> 8) { + &warn("(Command exited ", ($? >> 8), ")\n"); + } elsif ($?) { + &warn( "(Command died of SIG#", ($? & 127), + (($? & 128) ? " -- core dumped" : "") , ")", "\n"); + } + + return $?; + } sub setterm { @@ -1492,21 +2199,26 @@ 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: $!"; + my ($i, $o) = split $tty, /,/; + $o = $i unless defined $o; + open(IN,"<$i") or die "Cannot open TTY `$i' for read: $!"; + open(OUT,">$o") or die "Cannot open TTY `$o' for write: $!"; $IN = \*IN; $OUT = \*OUT; my $sel = select($OUT); $| = 1; select($sel); } else { - eval "require Term::Rendezvous;" or die $@; + eval "require Term::Rendezvous;" or die; my $rv = $ENV{PERLDB_NOTTY} || "/tmp/perldbtty$$"; my $term_rv = new Term::Rendezvous $rv; $IN = $term_rv->IN; $OUT = $term_rv->OUT; } } + if ($term_pid eq '-1') { # In a TTY with another debugger + resetterm(2); + } if (!$rl) { $term = new Term::ReadLine::Stub 'perldb', $IN, $OUT; } else { @@ -1530,38 +2242,119 @@ sub setterm { $term_pid = $$; } -sub resetterm { # We forked, so we need a different TTY - $term_pid = $$; - if (defined &get_fork_TTY) { - &get_fork_TTY; - } elsif (not defined $fork_TTY - and defined $ENV{TERM} and $ENV{TERM} eq 'xterm' - and defined $ENV{WINDOWID} and defined $ENV{DISPLAY}) { - # Possibly _inside_ XTERM - open XT, q[3>&1 xterm -title 'Forked Perl debugger' -e sh -c 'tty 1>&3;\ +# Example get_fork_TTY functions +sub xterm_get_fork_TTY { + (my $name = $0) =~ s,^.*[/\\],,s; + open XT, qq[3>&1 xterm -title "Daughter Perl debugger $pids $name" -e sh -c 'tty 1>&3;\ sleep 10000000' |]; - $fork_TTY = ; - chomp $fork_TTY; - } - if (defined $fork_TTY) { - TTY($fork_TTY); - undef $fork_TTY; - } else { + my $tty = ; + chomp $tty; + $pidprompt = ''; # Shown anyway in titlebar + return $tty; +} + +# This example function resets $IN, $OUT itself +sub os2_get_fork_TTY { + local $^F = 40; # XXXX Fixme! + local $\ = ''; + my ($in1, $out1, $in2, $out2); + # Having -d in PERL5OPT would lead to a disaster... + local $ENV{PERL5OPT} = $ENV{PERL5OPT} if $ENV{PERL5OPT}; + $ENV{PERL5OPT} =~ s/(?:^|(?<=\s))-d\b// if $ENV{PERL5OPT}; + $ENV{PERL5OPT} =~ s/(?:^|(?<=\s))-d\B/-/ if $ENV{PERL5OPT}; + print $OUT "Making kid PERL5OPT->`$ENV{PERL5OPT}'.\n" if $ENV{PERL5OPT}; + local $ENV{PERL5LIB} = $ENV{PERL5LIB} ? $ENV{PERL5LIB} : $ENV{PERLLIB}; + $ENV{PERL5LIB} = '' unless defined $ENV{PERL5LIB}; + $ENV{PERL5LIB} = join ';', @ini_INC, split /;/, $ENV{PERL5LIB}; + (my $name = $0) =~ s,^.*[/\\],,s; + my @args; + if ( pipe $in1, $out1 and pipe $in2, $out2 + # system P_SESSION will fail if there is another process + # in the same session with a "dependent" asynchronous child session. + and @args = ($rl, fileno $in1, fileno $out2, + "Daughter Perl debugger $pids $name") and + (($kpid = CORE::system 4, $^X, '-we', <<'ES', @args) >= 0 # P_SESSION +END {sleep 5 unless $loaded} +BEGIN {open STDIN, '&=$out" or die "Cannot open &=$out for writing: $!"; +select OUT; $| = 1; +require Term::ReadKey if $rl; +Term::ReadKey::ReadMode(4) if $rl; # Nodelay on kbd. Pipe is automatically nodelay... +print while sysread STDIN, $_, 1<<($rl ? 16 : 0); +ES + or warn "system P_SESSION: $!, $^E" and 0) + and close $in1 and close $out2 ) { + $pidprompt = ''; # Shown anyway in titlebar + reset_IN_OUT($in2, $out1); + $tty = '*reset*'; + return ''; # Indicate that reset_IN_OUT is called + } + return; +} + +sub create_IN_OUT { # Create a window with IN/OUT handles redirected there + my $in = &get_fork_TTY if defined &get_fork_TTY; + $in = $fork_TTY if defined $fork_TTY; # Backward compatibility + if (not defined $in) { + my $why = shift; + print_help(< Forked, but do not know how to create a new B. I<#########> +EOP + print_help(< Daughter session, do not know how to change a B. I<#########> + This may be an asynchronous session, so the parent debugger may be active. +EOP + print_help(< Forked, but do not know how to change a B. I<#########> - Define B<\$DB::fork_TTY> - - or a function B which will set B<\$DB::fork_TTY>. - The value of B<\$DB::fork_TTY> should be the name of I to use. + I know how to switch the output to a different window in xterms + and OS/2 consoles only. For a manual switch, put the name of the created I + in B<\$DB::fork_TTY>, or define a function B returning this. + On I-like systems one can get the name of a I for the given window by typing B, and disconnect the I from I by B. + EOP + } elsif ($in ne '') { + TTY($in); + } else { + $console = ''; # Indicate no need to open-from-the-console + } + undef $fork_TTY; +} + +sub resetterm { # We forked, so we need a different TTY + my $in = shift; + my $systemed = $in > 1 ? '-' : ''; + if ($pids) { + $pids =~ s/\]/$systemed->$$]/; + } else { + $pids = "[$term_pid->$$]"; } + $pidprompt = $pids; + $term_pid = $$; + return unless $CreateTTY & $in; + create_IN_OUT($in); } sub readline { + local $.; if (@typeahead) { my $left = @typeahead; my $got = shift @typeahead; + local $\ = ''; print $OUT "auto(-$left)", shift, $got, "\n"; $term->AddHistory($got) if length($got) > 1 and defined $term->Features->{addHistory}; @@ -1569,10 +2362,15 @@ sub readline { } local $frame = 0; local $doret = -2; + while (@cmdfhs) { + my $line = CORE::readline($cmdfhs[-1]); + defined $line ? (print $OUT ">> $line" and return $line) + : close pop @cmdfhs; + } if (ref $OUT and UNIVERSAL::isa($OUT, 'IO::Socket::INET')) { - print $OUT @_; + $OUT->write(join('', @_)); my $stuff; - $IN->recv( $stuff, 2048 ); + $IN->recv( $stuff, 2048 ); # XXX: what's wrong with sysread? $stuff; } else { @@ -1591,26 +2389,36 @@ sub option_val { my ($opt, $default)= @_; my $val; if (defined $optionVars{$opt} - and defined $ {$optionVars{$opt}}) { - $val = $ {$optionVars{$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}}) { + and not defined ${$optionVars{$opt}}) { $val = $default; } else { $val = $option{$opt}; } + $val = $default unless defined $val; $val } sub parse_options { local($_)= @_; - while ($_ ne "") { - s/^(\w+)(\s*$|\W)// or print($OUT "Invalid option `$_'\n"), last; + local $\ = ''; + # too dangerous to let intuitive usage overwrite important things + # defaultion should never be the default + my %opt_needs_val = map { ( $_ => 1 ) } qw{ + dumpDepth arrayDepth hashDepth LineInfo maxTraceLen ornaments windowSize + pager quote ReadLine recallCommand RemotePort ShellBang TTY + }; + while (length) { + my $val_defaulted; + s/^\s+// && next; + s/^(\w+)(\W?)// or print($OUT "Invalid option `$_'\n"), last; my ($opt,$sep) = ($1,$2); my $val; if ("?" eq $sep) { @@ -1618,59 +2426,83 @@ sub parse_options { if /^\S/; #&dump_option($opt); } elsif ($sep !~ /\S/) { - $val = "1"; + $val_defaulted = 1; + $val = "1"; # this is an evil default; make 'em set it! } elsif ($sep eq "=") { - s/^(\S*)($|\s+)//; + if (s/ (["']) ( (?: \\. | (?! \1 ) [^\\] )* ) \1 //x) { + my $quote = $1; + ($val = $2) =~ s/\\([$quote\\])/$1/g; + } else { + s/^(\S*)//; $val = $1; + print OUT qq(Option better cleared using $opt=""\n) + unless length $val; + } + } else { #{ to "let some poor schmuck bounce on the % key in B." my ($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])/$1/g; + ($val = $1) =~ s/\\([\\$end])/$1/g; } - my ($option); - my $matches = - grep( /^\Q$opt/ && ($option = $_), @options ); - $matches = grep( /^\Q$opt/i && ($option = $_), @options ) - unless $matches; - print $OUT "Unknown option `$opt'\n" unless $matches; - print $OUT "Ambiguous option `$opt'\n" if $matches > 1; - $option{$option} = $val if $matches == 1 and defined $val; - eval "local \$frame = 0; local \$doret = -2; - require '$optionRequire{$option}'" - if $matches == 1 and defined $optionRequire{$option} and defined $val; - $ {$optionVars{$option}} = $val - if $matches == 1 - and defined $optionVars{$option} and defined $val; - & {$optionAction{$option}} ($val) - if $matches == 1 - and defined $optionAction{$option} - and defined &{$optionAction{$option}} and defined $val; - &dump_option($option) if $matches == 1 && $OUT ne \*STDERR; # Not $rcfile - s/^\s+//; + + my $option; + my $matches = grep( /^\Q$opt/ && ($option = $_), @options ) + || grep( /^\Q$opt/i && ($option = $_), @options ); + + print($OUT "Unknown option `$opt'\n"), next unless $matches; + print($OUT "Ambiguous option `$opt'\n"), next if $matches > 1; + + if ($opt_needs_val{$option} && $val_defaulted) { + my $cmd = ($CommandSet eq '580') ? 'o' : 'O'; + print $OUT "Option `$opt' is non-boolean. Use `$cmd $option=VAL' to set, `$cmd $option?' to query\n"; + next; + } + + $option{$option} = $val if defined $val; + + eval qq{ + local \$frame = 0; + local \$doret = -2; + require '$optionRequire{$option}'; + 1; + } || die # XXX: shouldn't happen + if defined $optionRequire{$option} && + defined $val; + + ${$optionVars{$option}} = $val + if defined $optionVars{$option} && + defined $val; + + &{$optionAction{$option}} ($val) + if defined $optionAction{$option} && + defined &{$optionAction{$option}} && + defined $val; + + # Not $rcfile + dump_option($option) unless $OUT eq \*STDERR; } } sub set_list { my ($stem,@list) = @_; my $val; - $ENV{"$ {stem}_n"} = @list; + $ENV{"${stem}_n"} = @list; for $i (0 .. $#list) { $val = $list[$i]; $val =~ s/\\/\\\\/g; $val =~ s/([\0-\37\177\200-\377])/"\\0x" . unpack('H2',$1)/eg; - $ENV{"$ {stem}_$i"} = $val; + $ENV{"${stem}_$i"} = $val; } } sub get_list { my $stem = shift; my @list; - my $n = delete $ENV{"$ {stem}_n"}; + my $n = delete $ENV{"${stem}_n"}; my $val; for $i (0 .. $n - 1) { - $val = delete $ENV{"$ {stem}_$i"}; + $val = delete $ENV{"${stem}_$i"}; $val =~ s/\\((\\)|0x(..))/ $2 ? $2 : pack('H2', $3) /ge; push @list, $val; } @@ -1685,9 +2517,26 @@ sub catch { sub warn { my($msg)= join("",@_); $msg .= ": $!\n" unless $msg =~ /\n$/; + local $\ = ''; print $OUT $msg; } +sub reset_IN_OUT { + my $switch_li = $LINEINFO eq $OUT; + if ($term and $term->Features->{newTTY}) { + ($IN, $OUT) = (shift, shift); + $term->newTTY($IN, $OUT); + } elsif ($term) { + &warn("Too late to set IN/OUT filehandles, enabled on next `R'!\n"); + } else { + ($IN, $OUT) = (shift, shift); + } + my $o = select $OUT; + $| = 1; + select $o; + $LINEINFO = $OUT if $switch_li; +} + sub TTY { if (@_ and $term and $term->Features->{newTTY}) { my ($in, $out) = shift; @@ -1698,14 +2547,12 @@ sub TTY { } open IN, $in or die "cannot open `$in' for read: $!"; open OUT, ">$out" or die "cannot open `$out' for write: $!"; - $term->newTTY(\*IN, \*OUT); - $IN = \*IN; - $OUT = \*OUT; + reset_IN_OUT(\*IN,\*OUT); return $tty = $in; - } elsif ($term and @_) { - &warn("Too late to set TTY, enabled on next `R'!\n"); - } - $tty = shift if @_; + } + &warn("Too late to set TTY, enabled on next `R'!\n") if $term and @_; + # Useful if done through PERLDB_OPTS: + $console = $tty = shift if @_; $tty or $console; } @@ -1734,9 +2581,10 @@ sub RemotePort { } sub tkRunning { - if ($ {$term->Features}{tkRunning}) { + if (${$term->Features}{tkRunning}) { return $term->tkRunning(@_); } else { + local $\ = ''; print $OUT "tkRunning not supported by current ReadLine package.\n"; 0; } @@ -1766,7 +2614,6 @@ sub shellBang { $psh = $sh; $psh =~ s/\\b$//; $psh =~ s/\\(.)/$1/g; - &sethelp; $psh; } @@ -1788,7 +2635,6 @@ sub recallCommand { $prc = $rc; $prc =~ s/\\b$//; $prc =~ s/\\(.)/$1/g; - &sethelp; $prc; } @@ -1796,7 +2642,7 @@ sub LineInfo { return $lineinfo unless @_; $lineinfo = shift; my $stream = ($lineinfo =~ /^(\+?\>|\|)/) ? $lineinfo : ">$lineinfo"; - $emacs = ($stream =~ /^\|/); + $slave_editor = ($stream =~ /^\|/); open(LINEINFO, "$stream") || &warn("Cannot open `$stream' for write"); $LINEINFO = \*LINEINFO; my $save = select($LINEINFO); @@ -1805,7 +2651,7 @@ sub LineInfo { $lineinfo; } -sub list_versions { +sub list_modules { # versions my %version; my $file; for (keys %INC) { @@ -1814,8 +2660,8 @@ sub list_versions { s,/,::,g ; s/^perl5db$/DB/; s/^Term::ReadLine::readline$/readline/; - if (defined $ { $_ . '::VERSION' }) { - $version{$file} = "$ { $_ . '::VERSION' } from "; + if (defined ${ $_ . '::VERSION' }) { + $version{$file} = "${ $_ . '::VERSION' } from "; } $version{$file} .= $INC{$file}; } @@ -1823,7 +2669,190 @@ sub list_versions { } sub sethelp { + # XXX: make sure there are tabs between the command and explanation, + # or print_help will screw up your formatting if you have + # eeevil ornaments enabled. This is an insane mess. + $help = " +Help is currently only available for the new 580 CommandSet, +if you really want old behaviour, presumably you know what +you're doing ?-) + +B Stack trace. +B [I] Single step [in I]. +B [I] Next, steps over subroutine calls [in I]. +> Repeat last B or B command. +B Return from current subroutine. +B [I|I] Continue; optionally inserts a one-time-only breakpoint + at the specified position. +B IB<+>I List I+1 lines starting at I. +B IB<->I List lines I through I. +B I List single I. +B I List first window of lines from subroutine. +B I<\$var> List first window of lines from subroutine referenced by I<\$var>. +B List next window of lines. +B<-> List previous window of lines. +B [I] View window around I. +B<.> Return to the executed line. +B I Switch to viewing I. File must be already loaded. + I may be either the full name of the file, or a regular + expression matching the full file name: + B I and B I may access the same file. + Evals (with saved bodies) are considered to be filenames: + B I<(eval 7)> and B I access the body of the 7th eval + (in the order of execution). +BIB Search forwards for I; final B is optional. +BIB Search backwards for I; final B is optional. +B [I] List actions and or breakpoints and or watch-expressions. +B [[B]I] List subroutine names [not] matching I. +B Toggle trace mode. +B I Trace through execution of I. +B Sets breakpoint on current line) +B [I] [I] + Set breakpoint; I defaults to the current execution line; + I breaks if it evaluates to true, defaults to '1'. +B I [I] + Set breakpoint at first line of subroutine. +B I<\$var> Set breakpoint at first line of subroutine referenced by I<\$var>. +B B I Set breakpoint on 'require'ing the given file. +B B I [I] + Set breakpoint at first line of subroutine after + it is compiled. +B B I + Stop after the subroutine is compiled. +B [I] Delete the breakpoint for I. +B I<*> Delete all breakpoints. +B [I] I + Set an action to be done before the I is executed; + I defaults to the current execution line. + Sequence is: check for breakpoint/watchpoint, print line + if necessary, do action, prompt user if necessary, + execute line. +B Does nothing +B [I] Delete the action for I. +B I<*> Delete all actions. +B I Add a global watch-expression. +B Does nothing +B I Delete a global watch-expression. +B I<*> Delete all watch-expressions. +B [I [I]] List some (default all) variables in package (default current). + Use B<~>I and BI for positive and negative regexps. +B [I] Same as \"B I [I]\". +B [I [I]] List lexicals in higher scope . Vars same as B. +B I Evals expression in list context, dumps the result. +B I Evals expression in list context, prints methods callable + on the first element of the result. +B I Prints methods callable via the given class. +B Show versions of loaded modules. + +B<<> ? List Perl commands to run before each prompt. +B<<> I Define Perl command to run before each prompt. +B<<<> I Add to the list of Perl commands to run before each prompt. +B<>> ? List Perl commands to run after each prompt. +B<>> I Define Perl command to run after each prompt. +B<>>B<>> I Add to the list of Perl commands to run after each prompt. +B<{> I Define debugger command to run before each prompt. +B<{> ? List debugger commands to run before each prompt. +B<{{> I Add to the list of debugger commands to run before each prompt. +B<$prc> I Redo a previous command (default previous command). +B<$prc> I<-number> Redo number'th-to-last command. +B<$prc> I Redo last command that started with I. + See 'B I' too. +B<$psh$psh> I Run cmd in a subprocess (reads from DB::IN, writes to DB::OUT)" + . ( $rc eq $sh ? "" : " +B<$psh> [I] Run I in subshell (forces \"\$SHELL -c 'cmd'\")." ) . " + See 'B I' too. +B I Execute I containing debugger commands (may nest). +B I<-number> Display last number commands (default all). +B

I Same as \"I\" in current package. +B<|>I Run debugger command, piping DB::OUT to current pager. +B<||>I Same as B<|>I but DB::OUT is temporarilly select()ed as well. +B<\=> [I I] Define a command alias, or list current aliases. +I Execute as a perl statement in current package. +B Pure-man-restart of debugger, some of debugger state + and command-line options may be lost. + Currently the following settings are preserved: + history, breakpoints and actions, debugger Bptions + and the following command-line options: I<-w>, I<-I>, I<-e>. + +B [I] ... Set boolean option to true +B [IB] Query options +B [IB<=>I] [I=B<\">IB<\">] ... + Set options. Use quotes in spaces in value. + I, I chars used to recall command or spawn shell; + I program for output of \"|cmd\"; + I run Tk while prompting (with ReadLine); + I I I level of verbosity; + I Allows stepping off the end of the script. + I Debugger should stop as early as possible. + I Remote hostname:port for remote debugging + The following options affect what happens with B, B, and B commands: + I, I print only first N elements ('' for all); + I, I change style of array and hash dump; + I whether to print contents of globs; + I dump arrays holding debugged files; + I dump symbol tables of packages; + I dump contents of \"reused\" addresses; + I, I, I change style of string dump; + I Do not print the overload-stringified value; + Other options include: + I affects printing of return value after B command, + I affects printing messages on subroutine entry/exit. + I affects printing messages on possible breaking points. + I gives max length of evals/args listed in stack trace. + I affects screen appearance of the command line. + I bits control attempts to create a new TTY on events: + 1: on fork() 2: debugger is started inside debugger + 4: on startup + During startup options are initialized from \$ENV{PERLDB_OPTS}. + You can put additional initialization options I, I, + I, I, and I there (or use + `B' after you set them). + +B or B<^D> Quit. Set B<\$DB::finished = 0> to debug global destruction. +B Summary of debugger commands. +B [I] Get help [on a specific debugger command], enter B<|h> to page. +B Long help for debugger commands +B<$doccmd> I Runs the external doc viewer B<$doccmd> command on the + named Perl I, or on B<$doccmd> itself if omitted. + Set B<\$DB::doccmd> to change viewer. + +Type `|h h' for a paged display if this was too hard to read. + +"; # Fix balance of vi % matching: }}}} + + # note: tabs in the following section are not-so-helpful + $summary = <<"END_SUM"; +I I + B [I|I] List source code B Stack trace + B<-> or B<.> List previous/current line B [I] Single step [in expr] + B [I] View around line B [I] Next, steps over subs + B I View source in file /B> Repeat last B or B + BIB BIB Search forw/backw B Return from subroutine + B Show module versions B [I|I] Continue until position +I B List break/watch/actions + B [...] Set debugger options B [I] Toggle trace [trace expr] + B<<>[B<<>]|B<{>[B<{>]|B<>>[B<>>] [I] Do pre/post-prompt B [I|I|I] [I] Set breakpoint + B<$prc> [I|I] Redo a previous command B I Delete a/all breakpoints + B [I<-num>] Display last num commands B [I] I Do cmd before line + B<=> [I I] Define/list an alias B I Delete a/all actions + B [I] Get help on command B I Add a watch expression + B Complete help page B I Delete a/all watch exprs + B<|>[B<|>]I Send output to pager B<$psh>\[B<$psh>\] I Run cmd in a subprocess + B or B<^D> Quit B Attempt a restart +I B Execute perl code, also see: B,B,B I + B|B I Evals expr in list context, dumps the result or lists methods. + B

I Print expression (uses script's current package). + B [[B]I] List subroutine names [not] matching pattern + B [I [I]] List Variables in Package. Vars can be ~pattern or !pattern. + B [I] Same as \"B I [I]\". + B [I [I]] List lexicals in higher scope . Vars same as B. +For more help, type B I, or run B<$doccmd perldebug> for all docs. +END_SUM + # ')}}; # Fix balance of vi % matching + + # and this is really numb... + $pre580_help = " B Stack trace. B [I] Single step [in I]. B [I] Next, steps over subroutine calls [in I]. @@ -1880,43 +2909,19 @@ B Delete all watch-expressions. B [I [I]] List some (default all) variables in package (default current). Use B<~>I and BI for positive and negative regexps. B [I] Same as \"B I [I]\". -B I Evals expression in array context, dumps the result. -B I Evals expression in array context, prints methods callable +B I Evals expression in list context, dumps the result. +B I Evals expression in list context, prints methods callable on the first element of the result. B I Prints methods callable via the given class. -B [I[B<=>I]] [IB<\">IB<\">] [IB]... - Set or query values of options. I defaults to 1. I can - be abbreviated. Several options can be listed. - I, I: chars used to recall command or spawn shell; - I: program for output of \"|cmd\"; - I: run Tk while prompting (with ReadLine); - I I I: level of verbosity; - I Allows stepping off the end of the script. - I Debugger should stop as early as possible. - I: Remote hostname:port for remote debugging - The following options affect what happens with B, B, and B commands: - I, I: print only first N elements ('' for all); - I, I: change style of array and hash dump; - I: whether to print contents of globs; - I: dump arrays holding debugged files; - I: dump symbol tables of packages; - I: dump contents of \"reused\" addresses; - I, I, I: change style of string dump; - I: Do not print the overload-stringified value; - Option I affects printing of return value after B command, - I affects printing messages on entry and exit from subroutines. - I affects printing messages on every possible breaking point. - I gives maximal length of evals/args listed in stack trace. - I affects screen appearance of the command line. - During startup options are initialized from \$ENV{PERLDB_OPTS}. - You can put additional initialization options I, I, - I, I, and I there (or use - `B' after you set them). + +B<<> ? List Perl commands to run before each prompt. B<<> I Define Perl command to run before each prompt. B<<<> I Add to the list of Perl commands to run before each prompt. +B<>> ? List Perl commands to run after each prompt. B<>> I Define Perl command to run after each prompt. B<>>B<>> I Add to the list of Perl commands to run after each prompt. B<{> I Define debugger command to run before each prompt. +B<{> ? List debugger commands to run before each prompt. B<{{> I Add to the list of debugger commands to run before each prompt. B<$prc> I Redo a previous command (default previous command). B<$prc> I<-number> Redo number'th-to-last command. @@ -1926,6 +2931,7 @@ B<$psh$psh> I Run cmd in a subprocess (reads from DB::IN, writes to DB::O . ( $rc eq $sh ? "" : " B<$psh> [I] Run I in subshell (forces \"\$SHELL -c 'cmd'\")." ) . " See 'B I' too. +B I Execute I containing debugger commands (may nest). B I<-number> Display last number commands (default all). B

I Same as \"I\" in current package. B<|>I Run debugger command, piping DB::OUT to current pager. @@ -1935,24 +2941,64 @@ I Execute as a perl statement in current package. B Show versions of loaded modules. B Pure-man-restart of debugger, some of debugger state and command-line options may be lost. - Currently the following setting are preserved: + Currently the following settings are preserved: history, breakpoints and actions, debugger Bptions and the following command-line options: I<-w>, I<-I>, I<-e>. + +B [I] ... Set boolean option to true +B [IB] Query options +B [IB<=>I] [I=B<\">IB<\">] ... + Set options. Use quotes in spaces in value. + I, I chars used to recall command or spawn shell; + I program for output of \"|cmd\"; + I run Tk while prompting (with ReadLine); + I I I level of verbosity; + I Allows stepping off the end of the script. + I Debugger should stop as early as possible. + I Remote hostname:port for remote debugging + The following options affect what happens with B, B, and B commands: + I, I print only first N elements ('' for all); + I, I change style of array and hash dump; + I whether to print contents of globs; + I dump arrays holding debugged files; + I dump symbol tables of packages; + I dump contents of \"reused\" addresses; + I, I, I change style of string dump; + I Do not print the overload-stringified value; + Other options include: + I affects printing of return value after B command, + I affects printing messages on subroutine entry/exit. + I affects printing messages on possible breaking points. + I gives max length of evals/args listed in stack trace. + I affects screen appearance of the command line. + I bits control attempts to create a new TTY on events: + 1: on fork() 2: debugger is started inside debugger + 4: on startup + During startup options are initialized from \$ENV{PERLDB_OPTS}. + You can put additional initialization options I, I, + I, I, and I there (or use + `B' after you set them). + +B or B<^D> Quit. Set B<\$DB::finished = 0> to debug global destruction. B [I] Get help [on a specific debugger command], enter B<|h> to page. - Complete description of debugger is available in B - section of Perl documention B Summary of debugger commands. -B or B<^D> Quit. Set B<\$DB::finished = 0> to debug global destruction. +B<$doccmd> I Runs the external doc viewer B<$doccmd> command on the + named Perl I, or on B<$doccmd> itself if omitted. + Set B<\$DB::doccmd> to change viewer. -"; - $summary = <<"END_SUM"; +Type `|h' for a paged display if this was too hard to read. + +"; # Fix balance of vi % matching: }}}} + + # note: tabs in the following section are not-so-helpful + $pre580_summary = <<"END_SUM"; I I B [I|I] List source code B Stack trace B<-> or B<.> List previous/current line B [I] Single step [in expr] B [I] List around line B [I] Next, steps over subs B I View source in file /B> Repeat last B or B BIB BIB Search forw/backw B Return from subroutine - B Show versions of modules B [I|I] Continue until position + B Show versions of modules B [I|I] Continue until position I B List break/watch/actions B [...] Set debugger options B [I] Toggle trace [trace expr] B<<>[B<<>]|B<{>[B<{>]|B<>>[B<>>] [I] Do pre/post-prompt B [I|I|I] [I] Set breakpoint @@ -1961,25 +3007,81 @@ I B List break/watch/act B<=> [I I] Define/list an alias B I Add a watch expression B [I] Get help on command B or B Delete all actions/watch B<|>[B<|>]I Send output to pager B<$psh>\[B<$psh>\] I Run cmd in a subprocess - B or B<^D> Quit B Attempt a restart -I B Execute perl code, also see: B,B,B I - B|B I Evals expr in array context, dumps the result or lists methods. - B

I Print expression (uses script's current package). - B [[B]I] List subroutine names [not] matching pattern - B [I [I]] List Variables in Package. Vars can be ~pattern or !pattern. - B [I] Same as \"B I [I]\". -I BI<:> Type B I Run B for more help. + B or B<^D> Quit B Attempt a restart +I B Execute perl code, also see: B,B,B I + B|B I Evals expr in list context, dumps the result or lists methods. + B

I Print expression (uses script's current package). + B [[B]I] List subroutine names [not] matching pattern + B [I [I]] List Variables in Package. Vars can be ~pattern or !pattern. + B [I] Same as \"B I [I]\". + B [I [I]] List lexicals in higher scope . Vars same as B. +For more help, type B I, or run B<$doccmd perldebug> for all docs. END_SUM - # ')}}; # Fix balance of Emacs parsing + # ')}}; # Fix balance of vi % matching + } sub print_help { - my $message = shift; - if (@Term::ReadLine::TermCap::rl_term_set) { - $message =~ s/B<([^>]+|>)>/$Term::ReadLine::TermCap::rl_term_set[2]$1$Term::ReadLine::TermCap::rl_term_set[3]/g; - $message =~ s/I<([^>]+|>)>/$Term::ReadLine::TermCap::rl_term_set[0]$1$Term::ReadLine::TermCap::rl_term_set[1]/g; - } - print $OUT $message; + local $_ = shift; + + # Restore proper alignment destroyed by eeevil I<> and B<> + # ornaments: A pox on both their houses! + # + # A help command will have everything up to and including + # the first tab sequence padded into a field 16 (or if indented 20) + # wide. If it's wider than that, an extra space will be added. + s{ + ^ # only matters at start of line + ( \040{4} | \t )* # some subcommands are indented + ( < ? # so works + [BI] < [^\t\n] + ) # find an eeevil ornament + ( \t+ ) # original separation, discarded + ( .* ) # this will now start (no earlier) than + # column 16 + } { + my($leadwhite, $command, $midwhite, $text) = ($1, $2, $3, $4); + my $clean = $command; + $clean =~ s/[BI]<([^>]*)>/$1/g; + # replace with this whole string: + ($leadwhite ? " " x 4 : "") + . $command + . ((" " x (16 + ($leadwhite ? 4 : 0) - length($clean))) || " ") + . $text; + + }mgex; + + s{ # handle bold ornaments + B < ( [^>] + | > ) > + } { + $Term::ReadLine::TermCap::rl_term_set[2] + . $1 + . $Term::ReadLine::TermCap::rl_term_set[3] + }gex; + + s{ # handle italic ornaments + I < ( [^>] + | > ) > + } { + $Term::ReadLine::TermCap::rl_term_set[0] + . $1 + . $Term::ReadLine::TermCap::rl_term_set[1] + }gex; + + local $\ = ''; + print $OUT $_; +} + +sub fix_less { + return if defined $ENV{LESS} && $ENV{LESS} =~ /r/; + my $is_less = $pager =~ /\bless\b/; + if ($pager =~ /\bmore\b/) { + my @st_more = stat('/usr/bin/more'); + my @st_less = stat('/usr/bin/less'); + $is_less = @st_more && @st_less + && $st_more[0] == $st_less[0] + && $st_more[1] == $st_less[1]; + } + # changes environment! + $ENV{LESS} .= 'r' if $is_less; } sub diesignal { @@ -1993,6 +3095,7 @@ sub diesignal { &warn(Carp::longmess("Signal @_")); } else { + local $\ = ''; print $DB::OUT "Got signal @_\n"; } kill 'ABRT', $$; @@ -2005,7 +3108,7 @@ sub dbwarn { local $SIG{__DIE__} = ''; eval { require Carp } if defined $^S; # If error/warning during compilation, # require may be broken. - warn(@_, "\nCannot print stack trace, load with -MCarp option to see stack"), + CORE::warn(@_, "\nCannot print stack trace, load with -MCarp option to see stack"), return unless defined &Carp::longmess; my ($mysingle,$mytrace) = ($single,$trace); $single = 0; $trace = 0; @@ -2028,15 +3131,24 @@ sub dbdie { if ($dieLevel < 2) { die @_ if $^S; # in eval propagate } - eval { require Carp } if defined $^S; # If error/warning during compilation, + # No need to check $^S, eval is much more robust nowadays + eval { require Carp }; #if defined $^S;# If error/warning during compilation, # require may be broken. + die(@_, "\nCannot print stack trace, load with -MCarp option to see stack") unless defined &Carp::longmess; + # We do not want to debug this chunk (automatic disabling works # inside DB::DB, but not in Carp). my ($mysingle,$mytrace) = ($single,$trace); $single = 0; $trace = 0; - my $mess = Carp::longmess(@_); + my $mess = "@_"; + { + package Carp; # Do not include us in the list + eval { + $mess = Carp::longmess(@_); + }; + } ($single,$trace) = ($mysingle,$mytrace); die $mess; } @@ -2047,7 +3159,7 @@ sub warnLevel { $warnLevel = shift; if ($warnLevel) { $SIG{__WARN__} = \&DB::dbwarn; - } else { + } elsif ($prevwarn) { $SIG{__WARN__} = $prevwarn; } } @@ -2055,6 +3167,7 @@ sub warnLevel { } sub dieLevel { + local $\ = ''; if (@_) { $prevdie = $SIG{__DIE__} unless $dieLevel; $dieLevel = shift; @@ -2065,7 +3178,7 @@ sub dieLevel { ( $dieLevel == 1 ? " outside of evals" : ""), ".\n" if $I_m_init; print $OUT "Dump printed too.\n" if $dieLevel > 2; - } else { + } elsif ($prevdie) { $SIG{__DIE__} = $prevdie; print $OUT "Default die handler restored.\n"; } @@ -2098,6 +3211,7 @@ sub CvGV_name { sub CvGV_name_or_bust { my $in = shift; return if $skipCvGV; # Backdoor to avoid problems if XS broken... + return unless ref $in; $in = \&$in; # Hard reference... eval {require Devel::Peek; 1} or return; my $gv = Devel::Peek::CvGV($in) or return; @@ -2138,18 +3252,83 @@ sub methods_via { my $prefix = shift; my $prepend = $prefix ? "via $prefix: " : ''; my $name; - for $name (grep {defined &{$ {"$ {class}::"}{$_}}} - sort keys %{"$ {class}::"}) { + for $name (grep {defined &{${"${class}::"}{$_}}} + sort keys %{"${class}::"}) { next if $seen{ $name }++; + local $\ = ''; + local $, = ''; print $DB::OUT "$prepend$name\n"; } return unless shift; # Recurse? - for $name (@{"$ {class}::ISA"}) { + for $name (@{"${class}::ISA"}) { $prepend = $prefix ? $prefix . " -> $name" : $name; methods_via($name, $prepend, 1); } } +sub setman { + $doccmd = $^O !~ /^(?:MSWin32|VMS|os2|dos|amigaos|riscos|MacOS|NetWare)\z/s + ? "man" # O Happy Day! + : "perldoc"; # Alas, poor unfortunates +} + +sub runman { + my $page = shift; + unless ($page) { + &system("$doccmd $doccmd"); + return; + } + # this way user can override, like with $doccmd="man -Mwhatever" + # or even just "man " to disable the path check. + unless ($doccmd eq 'man') { + &system("$doccmd $page"); + return; + } + + $page = 'perl' if lc($page) eq 'help'; + + require Config; + my $man1dir = $Config::Config{'man1dir'}; + my $man3dir = $Config::Config{'man3dir'}; + for ($man1dir, $man3dir) { s#/[^/]*\z## if /\S/ } + my $manpath = ''; + $manpath .= "$man1dir:" if $man1dir =~ /\S/; + $manpath .= "$man3dir:" if $man3dir =~ /\S/ && $man1dir ne $man3dir; + chop $manpath if $manpath; + # harmless if missing, I figure + my $oldpath = $ENV{MANPATH}; + $ENV{MANPATH} = $manpath if $manpath; + my $nopathopt = $^O =~ /dunno what goes here/; + if (CORE::system($doccmd, + # I just *know* there are men without -M + (($manpath && !$nopathopt) ? ("-M", $manpath) : ()), + split ' ', $page) ) + { + unless ($page =~ /^perl\w/) { + if (grep { $page eq $_ } qw{ + 5004delta 5005delta amiga api apio book boot bot call compile + cygwin data dbmfilter debug debguts delta diag doc dos dsc embed + faq faq1 faq2 faq3 faq4 faq5 faq6 faq7 faq8 faq9 filter fork + form func guts hack hist hpux intern ipc lexwarn locale lol mod + modinstall modlib number obj op opentut os2 os390 pod port + ref reftut run sec style sub syn thrtut tie toc todo toot tootc + trap unicode var vms win32 xs xstut + }) + { + $page =~ s/^/perl/; + CORE::system($doccmd, + (($manpath && !$nopathopt) ? ("-M", $manpath) : ()), + $page); + } + } + } + if (defined $oldpath) { + $ENV{MANPATH} = $manpath; + } else { + delete $ENV{MANPATH}; + } +} + # The following BEGIN is very handy if debugger goes havoc, debugging debugger? BEGIN { # This does not compile, alas. @@ -2181,13 +3360,13 @@ BEGIN { # This does not compile, alas. BEGIN {$^W = $ini_warn;} # Switch warnings back -#use Carp; # This did break, left for debuggin +#use Carp; # This did break, left for debugging sub db_complete { # Specific code for b c l V m f O, &blah, $blah, @blah, %blah my($text, $line, $start) = @_; my ($itext, $search, $prefix, $pack) = - ($text, "^\Q$ {'package'}::\E([^:]+)\$"); + ($text, "^\Q${'package'}::\E([^:]+)\$"); return sort grep /^\Q$text/, (keys %sub), qw(postpone load compile), # subroutines (map { /$search/ ? ($1) : () } keys %sub) @@ -2264,14 +3443,141 @@ sub db_complete { } sub end_report { + local $\ = ''; print $OUT "Use `q' to quit or `R' to restart. `h q' for details.\n" } +sub clean_ENV { + if (defined($ini_pids)) { + $ENV{PERLDB_PIDS} = $ini_pids; + } else { + delete($ENV{PERLDB_PIDS}); + } +} + END { - $finished = $inhibit_exit; # So that some keys may be disabled. + $finished = 1 if $inhibit_exit; # So that some keys may be disabled. + $fall_off_end = 1 unless $inhibit_exit; # Do not stop in at_exit() and destructors on exit: - $DB::single = !$exiting && !$runnonstop; - DB::fake::at_exit() unless $exiting or $runnonstop; + $DB::single = !$fall_off_end && !$runnonstop; + DB::fake::at_exit() unless $fall_off_end or $runnonstop; +} + + +# ===================================== pre580 ================================ +# this is very sad below here... +# + +sub cmd_pre580_null { + # do nothing... +} + +sub cmd_pre580_a { + my $cmd = shift; + if ($cmd =~ /^(\d*)\s*(.*)/) { + $i = $1 || $line; $j = $2; + if (length $j) { + if ($dbline[$i] == 0) { + print $OUT "Line $i may not have an action.\n"; + } else { + $had_breakpoints{$filename} |= 2; + $dbline{$i} =~ s/\0[^\0]*//; + $dbline{$i} .= "\0" . action($j); + } + } else { + $dbline{$i} =~ s/\0[^\0]*//; + delete $dbline{$i} if $dbline{$i} eq ''; + } + } +} + +sub cmd_pre580_b { + my $cmd = shift; + my $dbline = shift; + if ($cmd =~ /^load\b\s*(.*)/) { + my $file = $1; $file =~ s/\s+$//; + &cmd_b_load($file); + } elsif ($cmd =~ /^(postpone|compile)\b\s*([':A-Za-z_][':\w]*)\s*(.*)/) { + my $cond = length $3 ? $3 : '1'; + my ($subname, $break) = ($2, $1 eq 'postpone'); + $subname =~ s/\'/::/g; + $subname = "${'package'}::" . $subname + unless $subname =~ /::/; + $subname = "main".$subname if substr($subname,0,2) eq "::"; + $postponed{$subname} = $break ? "break +0 if $cond" : "compile"; + } elsif ($cmd =~ /^([':A-Za-z_][':\w]*(?:\[.*\])?)\s*(.*)/) { + my $subname = $1; + my $cond = length $2 ? $2 : '1'; + &cmd_b_sub($subname, $cond); + } elsif ($cmd =~ /^(\d*)\s*(.*)/) { + my $i = $1 || $dbline; + my $cond = length $2 ? $2 : '1'; + &cmd_b_line($i, $cond); + } +} + +sub cmd_pre580_D { + my $cmd = shift; + if ($cmd =~ /^\s*$/) { + print $OUT "Deleting all breakpoints...\n"; + my $file; + for $file (keys %had_breakpoints) { + local *dbline = $main::{'_<' . $file}; + my $max = $#dbline; + my $was; + + for ($i = 1; $i <= $max ; $i++) { + if (defined $dbline{$i}) { + $dbline{$i} =~ s/^[^\0]+//; + if ($dbline{$i} =~ s/^\0?$//) { + delete $dbline{$i}; + } + } + } + + if (not $had_breakpoints{$file} &= ~1) { + delete $had_breakpoints{$file}; + } + } + undef %postponed; + undef %postponed_file; + undef %break_on_load; + } +} + +sub cmd_pre580_h { + my $cmd = shift; + if ($cmd =~ /^\s*$/) { + print_help($pre580_help); + } elsif ($cmd =~ /^h\s*/) { + print_help($pre580_summary); + } elsif ($cmd =~ /^h\s+(\S.*)$/) { + my $asked = $1; # for proper errmsg + my $qasked = quotemeta($asked); # for searching + # XXX: finds CR but not + if ($pre580_help =~ /^ is not a debugger command.\n"); + } + } +} + +sub cmd_pre580_W { + my $cmd = shift; + if ($cmd =~ /^$/) { + $trace &= ~2; + @to_watch = @old_watch = (); + } elsif ($cmd =~ /^(.*)/s) { + push @to_watch, $1; + $evalarg = $1; + my ($val) = &eval; + $val = (defined $val) ? "'$val'" : 'undef' ; + push @old_watch, $val; + $trace |= 2; + } } package DB::fake; @@ -2283,3 +3589,4 @@ sub at_exit { package DB; # Do not trace this 1; below! 1; +