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- package DB;
-
- # Debugger for Perl 5.00x; perl5db.pl patch level:
-
- $header = 'perl5db.pl patch level 0.94';
-
- # Enhanced by ilya@math.ohio-state.edu (Ilya Zakharevich)
- # Latest version available: ftp://ftp.math.ohio-state.edu/pub/users/ilya/perl
-
- # modified Perl debugger, to be run from Emacs in perldb-mode
- # Ray Lischner (uunet!mntgfx!lisch) as of 5 Nov 1990
- # Johan Vromans -- upgrade to 4.0 pl 10
- # Ilya Zakharevich -- patches after 5.001 (and some before ;-)
-
- #
- # This file is automatically included if you do perl -d.
- # It's probably not useful to include this yourself.
- #
- # Perl supplies the values for @line and %sub. It effectively inserts
- # a &DB'DB(<linenum>); in front of every place that can have a
- # breakpoint. Instead of a subroutine call it calls &DB::sub with
- # $DB::sub being the called subroutine. It also inserts a BEGIN
- # {require 'perl5db.pl'} before the first line.
- #
- # Note that no subroutine call is possible until &DB::sub is defined
- # (for subroutines defined outside this file). In fact the same is
- # true if $deep is not defined.
- #
- # $Log: perldb.pl,v $
-
- #
- # At start reads $rcfile that may set important options. This file
- # may define a subroutine &afterinit that will be executed after the
- # debugger is initialized.
- #
- # After $rcfile is read reads environment variable PERLDB_OPTS and parses
- # it as a rest of `O ...' line in debugger prompt.
- #
- # The options that can be specified only at startup:
- # [To set in $rcfile, call &parse_options("optionName=new_value").]
- #
- # TTY - the TTY to use for debugging i/o.
- #
- # noTTY - if set, goes in NonStop mode. On interrupt if TTY is not set
- # uses the value of noTTY or "/tmp/perldbtty$$" to find TTY using
- # Term::Rendezvous. Current variant is to have the name of TTY in this
- # file.
- #
- # ReadLine - If false, dummy ReadLine is used, so you can debug
- # ReadLine applications.
- #
- # NonStop - if true, no i/o is performed until interrupt.
- #
- # LineInfo - file or pipe to print line number info to. If it is a
- # pipe, a short "emacs like" message is used.
- #
- # Example $rcfile: (delete leading hashes!)
- #
- # &parse_options("NonStop=1 LineInfo=db.out");
- # sub afterinit { $trace = 1; }
- #
- # The script will run without human intervention, putting trace
- # information into db.out. (If you interrupt it, you would better
- # reset LineInfo to something "interactive"!)
- #
-
- # Needed for the statement after exec():
-
- BEGIN { $ini_warn = $^W; $^W = 0 } # Switch compilation warnings off until another BEGIN.
- local($^W) = 0; # Switch run-time warnings off during init.
- warn ( # Do not ;-)
- $dumpvar::hashDepth,
- $dumpvar::arrayDepth,
- $dumpvar::dumpDBFiles,
- $dumpvar::dumpPackages,
- $dumpvar::quoteHighBit,
- $dumpvar::printUndef,
- $dumpvar::globPrint,
- $readline::Tk_toloop,
- $dumpvar::usageOnly,
- @ARGS,
- $Carp::CarpLevel,
- $panic,
- $first_time,
- ) if 0;
-
- # Command-line + PERLLIB:
- @ini_INC = @INC;
-
- # $prevwarn = $prevdie = $prevbus = $prevsegv = ''; # Does not help?!
-
- $trace = $signal = $single = 0; # Uninitialized warning suppression
- # (local $^W cannot help - other packages!).
- @stack = (0);
-
- $option{PrintRet} = 1;
-
- @options = qw(hashDepth arrayDepth DumpDBFiles DumpPackages
- compactDump veryCompact quote HighBit undefPrint
- globPrint PrintRet UsageOnly frame
- TTY noTTY ReadLine NonStop LineInfo
- recallCommand ShellBang pager tkRunning
- signalLevel warnLevel dieLevel);
-
- %optionVars = (
- hashDepth => \$dumpvar::hashDepth,
- arrayDepth => \$dumpvar::arrayDepth,
- DumpDBFiles => \$dumpvar::dumpDBFiles,
- DumpPackages => \$dumpvar::dumpPackages,
- HighBit => \$dumpvar::quoteHighBit,
- undefPrint => \$dumpvar::printUndef,
- globPrint => \$dumpvar::globPrint,
- tkRunning => \$readline::Tk_toloop,
- UsageOnly => \$dumpvar::usageOnly,
- frame => \$frame,
- );
-
- %optionAction = (
- compactDump => \&dumpvar::compactDump,
- veryCompact => \&dumpvar::veryCompact,
- quote => \&dumpvar::quote,
- TTY => \&TTY,
- noTTY => \&noTTY,
- ReadLine => \&ReadLine,
- NonStop => \&NonStop,
- LineInfo => \&LineInfo,
- recallCommand => \&recallCommand,
- ShellBang => \&shellBang,
- pager => \&pager,
- signalLevel => \&signalLevel,
- warnLevel => \&warnLevel,
- dieLevel => \&dieLevel,
- );
-
- %optionRequire = (
- compactDump => 'dumpvar.pl',
- veryCompact => 'dumpvar.pl',
- quote => 'dumpvar.pl',
- );
-
- # These guys may be defined in $ENV{PERL5DB} :
- $rl = 1 unless defined $rl;
- warnLevel($warnLevel);
- dieLevel($dieLevel);
- signalLevel($signalLevel);
- &pager(defined($ENV{PAGER}) ? $ENV{PAGER} : "|more") unless defined $pager;
- &recallCommand("!") unless defined $prc;
- &shellBang("!") unless defined $psh;
-
- if (-e "/dev/tty") {
- $rcfile=".perldb";
- } else {
- $rcfile="perldb.ini";
- }
-
- if (-f $rcfile) {
- do "./$rcfile";
- } elsif (defined $ENV{LOGDIR} and -f "$ENV{LOGDIR}/$rcfile") {
- do "$ENV{LOGDIR}/$rcfile";
- } elsif (defined $ENV{HOME} and -f "$ENV{HOME}/$rcfile") {
- do "$ENV{HOME}/$rcfile";
- }
-
- if (defined $ENV{PERLDB_OPTS}) {
- parse_options($ENV{PERLDB_OPTS});
- }
-
- if (exists $ENV{PERLDB_RESTART}) {
- delete $ENV{PERLDB_RESTART};
- # $restart = 1;
- @hist = get_list('PERLDB_HIST');
- my @visited = get_list("PERLDB_VISITED");
- for (0 .. $#visited) {
- %{$postponed{$visited[$_]}} = get_list("PERLDB_FILE_$_");
- }
- my %opt = get_list("PERLDB_OPT");
- my ($opt,$val);
- while (($opt,$val) = each %opt) {
- $val =~ s/[\\\']/\\$1/g;
- parse_options("$opt'$val'");
- }
- @INC = get_list("PERLDB_INC");
- @ini_INC = @INC;
- }
-
- if ($notty) {
- $runnonstop = 1;
- } else {
- # Is Perl being run from Emacs?
- $emacs = ((defined $main::ARGV[0]) and ($main::ARGV[0] eq '-emacs'));
- $rl = 0, shift(@main::ARGV) if $emacs;
-
- #require Term::ReadLine;
-
- if (-e "/dev/tty") {
- $console = "/dev/tty";
- } elsif (-e "con") {
- $console = "con";
- } else {
- $console = "sys\$command";
- }
-
- # Around a bug:
- if (defined $ENV{OS2_SHELL} and $emacs) { # In OS/2
- $console = undef;
- }
-
- $console = $tty if defined $tty;
-
- if (defined $console) {
- open(IN,"+<$console") || open(IN,"<$console") || open(IN,"<&STDIN");
- open(OUT,"+>$console") || open(OUT,">$console") || open(OUT,">&STDERR")
- || open(OUT,">&STDOUT"); # so we don't dongle stdout
- } else {
- open(IN,"<&STDIN");
- open(OUT,">&STDERR") || open(OUT,">&STDOUT"); # so we don't dongle stdout
- $console = 'STDIN/OUT';
- }
- # so open("|more") can read from STDOUT and so we don't dingle stdin
- $IN = \*IN;
-
- $OUT = \*OUT;
- select($OUT);
- $| = 1; # for DB::OUT
- select(STDOUT);
-
- $LINEINFO = $OUT unless defined $LINEINFO;
- $lineinfo = $console unless defined $lineinfo;
-
- $| = 1; # for real STDOUT
-
- $header =~ s/.Header: ([^,]+),v(\s+\S+\s+\S+).*$/$1$2/;
- unless ($runnonstop) {
- print $OUT "\nLoading DB routines from $header\n";
- print $OUT ("Emacs support ",
- $emacs ? "enabled" : "available",
- ".\n");
- print $OUT "\nEnter h or `h h' for help.\n\n";
- }
- }
-
- @ARGS = @ARGV;
- for (@args) {
- s/\'/\\\'/g;
- s/(.*)/'$1'/ unless /^-?[\d.]+$/;
- }
-
- if (defined &afterinit) { # May be defined in $rcfile
- &afterinit();
- }
-
- ############################################################ Subroutines
-
- sub DB {
- unless ($first_time++) { # Do when-running init
- if ($runnonstop) { # Disable until signal
- for ($i=0; $i <= $#stack; ) {
- $stack[$i++] &= ~1;
- }
- $single = 0;
- return;
- }
- # Define a subroutine in which we will stop
- # eval <<'EOE';
- # sub at_end::db {"Debuggee terminating";}
- # END {
- # $DB::step = 1;
- # print $OUT "Debuggee terminating.\n";
- # &at_end::db;}
- # EOE
- }
- &save;
- if ($doret) {
- $doret = 0;
- if ($option{PrintRet}) {
- print $OUT "$retctx context return from $lastsub:",
- ($retctx eq 'list') ? "\n" : " " ;
- dumpit( ($retctx eq 'list') ? \@ret : $ret );
- }
- }
- ($package, $filename, $line) = caller;
- $filename_ini = $filename;
- $usercontext = '($@, $!, $,, $/, $\, $^W) = @saved;' .
- "package $package;"; # this won't let them modify, alas
- local(*dbline) = "::_<$filename";
- install_breakpoints($filename) unless $visited{$filename}++;
- $max = $#dbline;
- if (($stop,$action) = split(/\0/,$dbline{$line})) {
- if ($stop eq '1') {
- $signal |= 1;
- } elsif ($stop) {
- $evalarg = "\$DB::signal |= do {$stop;}"; &eval;
- $dbline{$line} =~ s/;9($|\0)/$1/;
- }
- }
- if ($single || $trace || $signal) {
- $term || &setterm;
- if ($emacs) {
- $position = "\032\032$filename:$line:0\n";
- print $LINEINFO $position;
- } else {
- $sub =~ s/\'/::/;
- $prefix = $sub =~ /::/ ? "" : "${'package'}::";
- $prefix .= "$sub($filename:";
- $after = ($dbline[$line] =~ /\n$/ ? '' : "\n");
- if (length($prefix) > 30) {
- $position = "$prefix$line):\n$line:\t$dbline[$line]$after";
- print $LINEINFO $position;
- $prefix = "";
- $infix = ":\t";
- } else {
- $infix = "):\t";
- $position = "$prefix$line$infix$dbline[$line]$after";
- print $LINEINFO $position;
- }
- for ($i = $line + 1; $i <= $max && $dbline[$i] == 0; ++$i) { #{ vi
- last if $dbline[$i] =~ /^\s*[\;\}\#\n]/;
- $after = ($dbline[$i] =~ /\n$/ ? '' : "\n");
- $incr_pos = "$prefix$i$infix$dbline[$i]$after";
- print $LINEINFO $incr_pos;
- $position .= $incr_pos;
- }
- }
- }
- $evalarg = $action, &eval if $action;
- if ($single || $signal) {
- local $level = $level + 1;
- $evalarg = $pre, &eval if $pre;
- print $OUT $#stack . " levels deep in subroutine calls!\n"
- if $single & 4;
- $start = $line;
- CMD:
- while (($term || &setterm),
- defined ($cmd=&readline(" DB" . ('<' x $level) .
- ($#hist+1) . ('>' x $level) .
- " "))) {
- #{ # <-- Do we know what this brace is for?
- $single = 0;
- $signal = 0;
- $cmd =~ s/\\$/\n/ && do {
- $cmd .= &readline(" cont: ");
- redo CMD;
- };
- $cmd =~ /^q$/ && exit 0;
- $cmd =~ /^$/ && ($cmd = $laststep);
- push(@hist,$cmd) if length($cmd) > 1;
- PIPE: {
- ($i) = split(/\s+/,$cmd);
- eval "\$cmd =~ $alias{$i}", print $OUT $@ if $alias{$i};
- $cmd =~ /^h$/ && do {
- print $OUT $help;
- next CMD; };
- $cmd =~ /^h\s+h$/ && do {
- print $OUT $summary;
- next CMD; };
- $cmd =~ /^h\s+(\S)$/ && do {
- my $asked = "\Q$1";
- if ($help =~ /^($asked([\s\S]*?)\n)(\Z|[^\s$asked])/m) {
- print $OUT $1;
- } else {
- print $OUT "`$asked' is not a debugger command.\n";
- }
- next CMD; };
- $cmd =~ /^t$/ && do {
- $trace = !$trace;
- print $OUT "Trace = ".($trace?"on":"off")."\n";
- next CMD; };
- $cmd =~ /^S(\s+(!)?(.+))?$/ && do {
- $Srev = defined $2; $Spatt = $3; $Snocheck = ! defined $1;
- foreach $subname (sort(keys %sub)) {
- if ($Snocheck or $Srev^($subname =~ /$Spatt/)) {
- print $OUT $subname,"\n";
- }
- }
- next CMD; };
- $cmd =~ s/^X\b/V $package/;
- $cmd =~ /^V$/ && do {
- $cmd = "V $package"; };
- $cmd =~ /^V\b\s*(\S+)\s*(.*)/ && do {
- local ($savout) = select($OUT);
- $packname = $1;
- @vars = split(' ',$2);
- do 'dumpvar.pl' unless defined &main::dumpvar;
- if (defined &main::dumpvar) {
- local $frame = 0;
- &main::dumpvar($packname,@vars);
- } else {
- print $OUT "dumpvar.pl not available.\n";
- }
- select ($savout);
- next CMD; };
- $cmd =~ s/^x\b/ / && do { # So that will be evaled
- $onetimeDump = 1; };
- $cmd =~ /^f\b\s*(.*)/ && do {
- $file = $1;
- if (!$file) {
- print $OUT "The old f command is now the r command.\n";
- print $OUT "The new f command switches filenames.\n";
- next CMD;
- }
- if (!defined $main::{'_<' . $file}) {
- if (($try) = grep(m#^_<.*$file#, keys %main::)) {{
- $file = substr($try,2);
- print "\n$file:\n";
- }}
- }
- if (!defined $main::{'_<' . $file}) {
- print $OUT "There's no code here matching $file.\n";
- next CMD;
- } elsif ($file ne $filename) {
- *dbline = "::_<$file";
- $visited{$file}++;
- $max = $#dbline;
- $filename = $file;
- $start = 1;
- $cmd = "l";
- } };
- $cmd =~ /^l\b\s*([\':A-Za-z_][\':\w]*)/ && do {
- $subname = $1;
- $subname =~ s/\'/::/;
- $subname = "main::".$subname unless $subname =~ /::/;
- $subname = "main".$subname if substr($subname,0,2) eq "::";
- @pieces = split(/:/,$sub{$subname});
- $subrange = pop @pieces;
- $file = join(':', @pieces);
- if ($file ne $filename) {
- *dbline = "::_<$file";
- $visited{$file}++;
- $max = $#dbline;
- $filename = $file;
- }
- if ($subrange) {
- if (eval($subrange) < -$window) {
- $subrange =~ s/-.*/+/;
- }
- $cmd = "l $subrange";
- } else {
- print $OUT "Subroutine $subname not found.\n";
- next CMD;
- } };
- $cmd =~ /^\.$/ && do {
- $start = $line;
- $filename = $filename_ini;
- *dbline = "::_<$filename";
- $max = $#dbline;
- print $LINEINFO $position;
- next CMD };
- $cmd =~ /^w\b\s*(\d*)$/ && do {
- $incr = $window - 1;
- $start = $1 if $1;
- $start -= $preview;
- #print $OUT 'l ' . $start . '-' . ($start + $incr);
- $cmd = 'l ' . $start . '-' . ($start + $incr); };
- $cmd =~ /^-$/ && do {
- $incr = $window - 1;
- $cmd = 'l ' . ($start-$window*2) . '+'; };
- $cmd =~ /^l$/ && do {
- $incr = $window - 1;
- $cmd = 'l ' . $start . '-' . ($start + $incr); };
- $cmd =~ /^l\b\s*(\d*)\+(\d*)$/ && do {
- $start = $1 if $1;
- $incr = $2;
- $incr = $window - 1 unless $incr;
- $cmd = 'l ' . $start . '-' . ($start + $incr); };
- $cmd =~ /^l\b\s*((-?[\d\$\.]+)([-,]([\d\$\.]+))?)?/ && do {
- $end = (!defined $2) ? $max : ($4 ? $4 : $2);
- $end = $max if $end > $max;
- $i = $2;
- $i = $line if $i eq '.';
- $i = 1 if $i < 1;
- if ($emacs) {
- print $OUT "\032\032$filename:$i:0\n";
- $i = $end;
- } else {
- for (; $i <= $end; $i++) {
- ($stop,$action) = split(/\0/, $dbline{$i});
- $arrow = ($i==$line
- and $filename eq $filename_ini)
- ? '==>'
- : ':' ;
- $arrow .= 'b' if $stop;
- $arrow .= 'a' if $action;
- print $OUT "$i$arrow\t", $dbline[$i];
- last if $signal;
- }
- }
- $start = $i; # remember in case they want more
- $start = $max if $start > $max;
- next CMD; };
- $cmd =~ /^D$/ && do {
- print $OUT "Deleting all breakpoints...\n";
- for ($i = 1; $i <= $max ; $i++) {
- if (defined $dbline{$i}) {
- $dbline{$i} =~ s/^[^\0]+//;
- if ($dbline{$i} =~ s/^\0?$//) {
- delete $dbline{$i};
- }
- }
- }
- next CMD; };
- $cmd =~ /^L$/ && do {
- for ($i = 1; $i <= $max; $i++) {
- if (defined $dbline{$i}) {
- print $OUT "$i:\t", $dbline[$i];
- ($stop,$action) = split(/\0/, $dbline{$i});
- print $OUT " break if (", $stop, ")\n"
- if $stop;
- print $OUT " action: ", $action, "\n"
- if $action;
- last if $signal;
- }
- }
- next CMD; };
- $cmd =~ /^b\b\s*([':A-Za-z_][':\w]*)\s*(.*)/ && do {
- $subname = $1;
- $cond = $2 || '1';
- $subname =~ s/\'/::/;
- $subname = "${'package'}::" . $subname
- unless $subname =~ /::/;
- $subname = "main".$subname if substr($subname,0,2) eq "::";
- # Filename below can contain ':'
- ($file,$i) = ($sub{$subname} =~ /^(.*):(.*)$/);
- $i += 0;
- if ($i) {
- $filename = $file;
- *dbline = "::_<$filename";
- $visited{$filename}++;
- $max = $#dbline;
- ++$i while $dbline[$i] == 0 && $i < $max;
- $dbline{$i} =~ s/^[^\0]*/$cond/;
- } else {
- print $OUT "Subroutine $subname not found.\n";
- }
- next CMD; };
- $cmd =~ /^b\b\s*(\d*)\s*(.*)/ && do {
- $i = ($1?$1:$line);
- $cond = $2 || '1';
- if ($dbline[$i] == 0) {
- print $OUT "Line $i not breakable.\n";
- } else {
- $dbline{$i} =~ s/^[^\0]*/$cond/;
- }
- next CMD; };
- $cmd =~ /^d\b\s*(\d+)?/ && do {
- $i = ($1?$1:$line);
- $dbline{$i} =~ s/^[^\0]*//;
- delete $dbline{$i} if $dbline{$i} eq '';
- next CMD; };
- $cmd =~ /^A$/ && do {
- for ($i = 1; $i <= $max ; $i++) {
- if (defined $dbline{$i}) {
- $dbline{$i} =~ s/\0[^\0]*//;
- delete $dbline{$i} if $dbline{$i} eq '';
- }
- }
- next CMD; };
- $cmd =~ /^O\s*$/ && do {
- for (@options) {
- &dump_option($_);
- }
- next CMD; };
- $cmd =~ /^O\s*(\S.*)/ && do {
- parse_options($1);
- next CMD; };
- $cmd =~ /^<\s*(.*)/ && do {
- $pre = action($1);
- next CMD; };
- $cmd =~ /^>\s*(.*)/ && do {
- $post = action($1);
- next CMD; };
- $cmd =~ /^a\b\s*(\d+)(\s+(.*))?/ && do {
- $i = $1; $j = $3;
- if ($dbline[$i] == 0) {
- print $OUT "Line $i may not have an action.\n";
- } else {
- $dbline{$i} =~ s/\0[^\0]*//;
- $dbline{$i} .= "\0" . action($j);
- }
- next CMD; };
- $cmd =~ /^n$/ && do {
- $single = 2;
- $laststep = $cmd;
- last CMD; };
- $cmd =~ /^s$/ && do {
- $single = 1;
- $laststep = $cmd;
- last CMD; };
- $cmd =~ /^c\b\s*([\w:]*)\s*$/ && do {
- $i = $1;
- if ($i =~ /\D/) { # subroutine name
- ($file,$i) = ($sub{$i} =~ /^(.*):(.*)$/);
- $i += 0;
- if ($i) {
- $filename = $file;
- *dbline = "::_<$filename";
- $visited{$filename}++;
- $max = $#dbline;
- ++$i while $dbline[$i] == 0 && $i < $max;
- } else {
- print $OUT "Subroutine $subname not found.\n";
- next CMD;
- }
- }
- if ($i) {
- if ($dbline[$i] == 0) {
- print $OUT "Line $i not breakable.\n";
- next CMD;
- }
- $dbline{$i} =~ s/($|\0)/;9$1/; # add one-time-only b.p.
- }
- for ($i=0; $i <= $#stack; ) {
- $stack[$i++] &= ~1;
- }
- last CMD; };
- $cmd =~ /^r$/ && do {
- $stack[$#stack] |= 1;
- $doret = 1;
- last CMD; };
- $cmd =~ /^R$/ && do {
- print $OUT "Warning: a lot of settings and command-line options may be lost!\n";
- my (@script, @flags, $cl);
- push @flags, '-w' if $ini_warn;
- # Put all the old includes at the start to get
- # the same debugger.
- for (@ini_INC) {
- push @flags, '-I', $_;
- }
- # Arrange for setting the old INC:
- set_list("PERLDB_INC", @ini_INC);
- if ($0 eq '-e') {
- for (1..$#{'::_<-e'}) { # The first line is PERL5DB
- chomp ($cl = $ {'::_<-e'}[$_]);
- push @script, '-e', $cl;
- }
- } else {
- @script = $0;
- }
- set_list("PERLDB_HIST",
- $term->Features->{getHistory}
- ? $term->GetHistory : @hist);
- my @visited = keys %visited;
- set_list("PERLDB_VISITED", @visited);
- set_list("PERLDB_OPT", %option);
- for (0 .. $#visited) {
- *dbline = "::_<$visited[$_]";
- set_list("PERLDB_FILE_$_", %dbline);
- }
- $ENV{PERLDB_RESTART} = 1;
- #print "$^X, '-d', @flags, @script, ($emacs ? '-emacs' : ()), @ARGS";
- exec $^X, '-d', @flags, @script, ($emacs ? '-emacs' : ()), @ARGS;
- print $OUT "exec failed: $!\n";
- last CMD; };
- $cmd =~ /^T$/ && do {
- local($p,$f,$l,$s,$h,$a,$e,$r,@a,@sub);
- for ($i = 1;
- ($p,$f,$l,$s,$h,$w,$e,$r) = caller($i);
- $i++) {
- @a = ();
- for $arg (@args) {
- $_ = "$arg";
- s/([\'\\])/\\$1/g;
- s/([^\0]*)/'$1'/
- unless /^(?: -?[\d.]+ | \*[\w:]* )$/x;
- s/([\200-\377])/sprintf("M-%c",ord($1)&0177)/eg;
- s/([\0-\37\177])/sprintf("^%c",ord($1)^64)/eg;
- push(@a, $_);
- }
- $w = $w ? '@ = ' : '$ = ';
- $a = $h ? '(' . join(', ', @a) . ')' : '';
- $e =~ s/\n\s*\;\s*\Z// if $e;
- $e =~ s/[\\\']/\\$1/g if $e;
- if ($r) {
- $s = "require '$e'";
- } elsif (defined $r) {
- $s = "eval '$e'";
- } elsif ($s eq '(eval)') {
- $s = "eval {...}";
- }
- $f = "file `$f'" unless $f eq '-e';
- push(@sub, "$w$s$a called from $f line $l\n");
- last if $signal;
- }
- for ($i=0; $i <= $#sub; $i++) {
- last if $signal;
- print $OUT $sub[$i];
- }
- next CMD; };
- $cmd =~ /^\/(.*)$/ && do {
- $inpat = $1;
- $inpat =~ s:([^\\])/$:$1:;
- if ($inpat ne "") {
- eval '$inpat =~ m'."\a$inpat\a";
- if ($@ ne "") {
- print $OUT "$@";
- next CMD;
- }
- $pat = $inpat;
- }
- $end = $start;
- eval '
- for (;;) {
- ++$start;
- $start = 1 if ($start > $max);
- last if ($start == $end);
- if ($dbline[$start] =~ m' . "\a$pat\a" . 'i) {
- if ($emacs) {
- print $OUT "\032\032$filename:$start:0\n";
- } else {
- print $OUT "$start:\t", $dbline[$start], "\n";
- }
- last;
- }
- } ';
- print $OUT "/$pat/: not found\n" if ($start == $end);
- next CMD; };
- $cmd =~ /^\?(.*)$/ && do {
- $inpat = $1;
- $inpat =~ s:([^\\])\?$:$1:;
- if ($inpat ne "") {
- eval '$inpat =~ m'."\a$inpat\a";
- if ($@ ne "") {
- print $OUT "$@";
- next CMD;
- }
- $pat = $inpat;
- }
- $end = $start;
- eval '
- for (;;) {
- --$start;
- $start = $max if ($start <= 0);
- last if ($start == $end);
- if ($dbline[$start] =~ m' . "\a$pat\a" . 'i) {
- if ($emacs) {
- print $OUT "\032\032$filename:$start:0\n";
- } else {
- print $OUT "$start:\t", $dbline[$start], "\n";
- }
- last;
- }
- } ';
- print $OUT "?$pat?: not found\n" if ($start == $end);
- next CMD; };
- $cmd =~ /^$rc+\s*(-)?(\d+)?$/ && do {
- pop(@hist) if length($cmd) > 1;
- $i = $1 ? ($#hist-($2?$2:1)) : ($2?$2:$#hist);
- $cmd = $hist[$i] . "\n";
- print $OUT $cmd;
- redo CMD; };
- $cmd =~ /^$sh$sh\s*/ && do {
- &system($');
- next CMD; };
- $cmd =~ /^$rc([^$rc].*)$/ && do {
- $pat = "^$1";
- pop(@hist) if length($cmd) > 1;
- for ($i = $#hist; $i; --$i) {
- last if $hist[$i] =~ /$pat/;
- }
- if (!$i) {
- print $OUT "No such command!\n\n";
- next CMD;
- }
- $cmd = $hist[$i] . "\n";
- print $OUT $cmd;
- redo CMD; };
- $cmd =~ /^$sh$/ && do {
- &system($ENV{SHELL}||"/bin/sh");
- next CMD; };
- $cmd =~ /^$sh\s*/ && do {
- &system($ENV{SHELL}||"/bin/sh","-c",$');
- next CMD; };
- $cmd =~ /^H\b\s*(-(\d+))?/ && do {
- $end = $2?($#hist-$2):0;
- $hist = 0 if $hist < 0;
- for ($i=$#hist; $i>$end; $i--) {
- print $OUT "$i: ",$hist[$i],"\n"
- unless $hist[$i] =~ /^.?$/;
- };
- next CMD; };
- $cmd =~ s/^p$/print \$DB::OUT \$_/;
- $cmd =~ s/^p\b/print \$DB::OUT /;
- $cmd =~ /^=/ && do {
- if (local($k,$v) = ($cmd =~ /^=\s*(\S+)\s+(.*)/)) {
- $alias{$k}="s~$k~$v~";
- print $OUT "$k = $v\n";
- } elsif ($cmd =~ /^=\s*$/) {
- foreach $k (sort keys(%alias)) {
- if (($v = $alias{$k}) =~ s~^s\~$k\~(.*)\~$~$1~) {
- print $OUT "$k = $v\n";
- } else {
- print $OUT "$k\t$alias{$k}\n";
- };
- };
- };
- next CMD; };
- $cmd =~ /^\|\|?\s*[^|]/ && do {
- if ($pager =~ /^\|/) {
- open(SAVEOUT,">&STDOUT") || &warn("Can't save STDOUT");
- open(STDOUT,">&OUT") || &warn("Can't redirect STDOUT");
- } else {
- open(SAVEOUT,">&OUT") || &warn("Can't save DB::OUT");
- }
- unless ($piped=open(OUT,$pager)) {
- &warn("Can't pipe output to `$pager'");
- if ($pager =~ /^\|/) {
- open(OUT,">&STDOUT") || &warn("Can't restore DB::OUT");
- open(STDOUT,">&SAVEOUT")
- || &warn("Can't restore STDOUT");
- close(SAVEOUT);
- } else {
- open(OUT,">&STDOUT") || &warn("Can't restore DB::OUT");
- }
- next CMD;
- }
- $SIG{PIPE}= "DB::catch" if $pager =~ /^\|/
- && "" eq $SIG{PIPE} || "DEFAULT" eq $SIG{PIPE};
- $selected= select(OUT);
- $|= 1;
- select( $selected ), $selected= "" unless $cmd =~ /^\|\|/;
- $cmd =~ s/^\|+\s*//;
- redo PIPE; };
- # XXX Local variants do not work!
- $cmd =~ s/^t\s/\$DB::trace = 1;\n/;
- $cmd =~ s/^s\s/\$DB::single = 1;\n/ && do {$laststep = 's'};
- $cmd =~ s/^n\s/\$DB::single = 2;\n/ && do {$laststep = 'n'};
- } # PIPE:
- #} # <-- Do we know what this brace is for?
- $evalarg = "\$^D = \$^D | \$DB::db_stop;\n$cmd"; &eval;
- if ($onetimeDump) {
- $onetimeDump = undef;
- } else {
- print $OUT "\n";
- }
- } continue { # CMD:
- if ($piped) {
- if ($pager =~ /^\|/) {
- $?= 0; close(OUT) || &warn("Can't close DB::OUT");
- &warn( "Pager `$pager' failed: ",
- ($?>>8) > 128 ? ($?>>8)-256 : ($?>>8),
- ( $? & 128 ) ? " (core dumped)" : "",
- ( $? & 127 ) ? " (SIG ".($?&127).")" : "", "\n" ) if $?;
- open(OUT,">&STDOUT") || &warn("Can't restore DB::OUT");
- open(STDOUT,">&SAVEOUT") || &warn("Can't restore STDOUT");
- $SIG{PIPE}= "DEFAULT" if $SIG{PIPE} eq "DB::catch";
- # Will stop ignoring SIGPIPE if done like nohup(1)
- # does SIGINT but Perl doesn't give us a choice.
- } else {
- open(OUT,">&SAVEOUT") || &warn("Can't restore DB::OUT");
- }
- close(SAVEOUT);
- select($selected), $selected= "" unless $selected eq "";
- $piped= "";
- }
- } # CMD:
- if ($post) {
- $evalarg = $post; &eval;
- }
- } # if ($single || $signal)
- ($@, $!, $,, $/, $\, $^W) = @saved;
- ();
- }
-
- # The following code may be executed now:
- # BEGIN {warn 4}
-
- sub sub {
- print $LINEINFO ' ' x $#stack, "entering $sub\n" if $frame;
- push(@stack, $single);
- $single &= 1;
- $single |= 4 if $#stack == $deep;
- if (wantarray) {
- @ret = &$sub;
- $single |= pop(@stack);
- $retctx = "list";
- $lastsub = $sub;
- print $LINEINFO ' ' x $#stack, "exited $sub\n" if $frame;
- @ret;
- } else {
- $ret = &$sub;
- $single |= pop(@stack);
- $retctx = "scalar";
- $lastsub = $sub;
- print $LINEINFO ' ' x $#stack, "exited $sub\n" if $frame;
- $ret;
- }
- }
-
- sub save {
- @saved = ($@, $!, $,, $/, $\, $^W);
- $, = ""; $/ = "\n"; $\ = ""; $^W = 0;
- }
-
- # The following takes its argument via $evalarg to preserve current @_
-
- sub eval {
- my @res;
- {
- local (@stack) = @stack; # guard against recursive debugging
- my $otrace = $trace;
- my $osingle = $single;
- my $od = $^D;
- @res = eval "$usercontext $evalarg;\n"; # '\n' for nice recursive debug
- $trace = $otrace;
- $single = $osingle;
- $^D = $od;
- }
- my $at = $@;
- eval "&DB::save";
- if ($at) {
- print $OUT $at;
- } elsif ($onetimeDump) {
- dumpit(\@res);
- }
- }
-
- sub install_breakpoints {
- my $filename = shift;
- return unless exists $postponed{$filename};
- my %break = %{$postponed{$filename}};
- for (keys %break) {
- my $i = $_;
- #if (/\D/) { # Subroutine name
- #}
- $dbline{$i} = $break{$_}; # Cannot be done before the file is around
- }
- }
-
- sub dumpit {
- local ($savout) = select($OUT);
- do 'dumpvar.pl' unless defined &main::dumpValue;
- if (defined &main::dumpValue) {
- local $frame = 0;
- &main::dumpValue(shift);
- } else {
- print $OUT "dumpvar.pl not available.\n";
- }
- select ($savout);
- }
-
- sub action {
- my $action = shift;
- while ($action =~ s/\\$//) {
- #print $OUT "+ ";
- #$action .= "\n";
- $action .= &gets;
- }
- $action;
- }
-
- sub gets {
- local($.);
- #<IN>;
- &readline("cont: ");
- }
-
- sub system {
- # We save, change, then restore STDIN and STDOUT to avoid fork() since
- # many non-Unix systems can do system() but have problems with fork().
- open(SAVEIN,"<&STDIN") || &warn("Can't save STDIN");
- open(SAVEOUT,">&OUT") || &warn("Can't save STDOUT");
- open(STDIN,"<&IN") || &warn("Can't redirect STDIN");
- open(STDOUT,">&OUT") || &warn("Can't redirect STDOUT");
- system(@_);
- open(STDIN,"<&SAVEIN") || &warn("Can't restore STDIN");
- open(STDOUT,">&SAVEOUT") || &warn("Can't restore STDOUT");
- close(SAVEIN); close(SAVEOUT);
- &warn( "(Command returned ", ($?>>8) > 128 ? ($?>>8)-256 : ($?>>8), ")",
- ( $? & 128 ) ? " (core dumped)" : "",
- ( $? & 127 ) ? " (SIG ".($?&127).")" : "", "\n" ) if $?;
- $?;
- }
-
- sub setterm {
- local $frame = 0;
- eval "require Term::ReadLine;" or die $@;
- if ($notty) {
- if ($tty) {
- open(IN,"<$tty") or die "Cannot open TTY `$TTY' for read: $!";
- open(OUT,">$tty") or die "Cannot open TTY `$TTY' for write: $!";
- $IN = \*IN;
- $OUT = \*OUT;
- my $sel = select($OUT);
- $| = 1;
- select($sel);
- } else {
- eval "require Term::Rendezvous;" or die $@;
- my $rv = $ENV{PERLDB_NOTTY} || "/tmp/perldbtty$$";
- my $term_rv = new Term::Rendezvous $rv;
- $IN = $term_rv->IN;
- $OUT = $term_rv->OUT;
- }
- }
- if (!$rl) {
- $term = new Term::ReadLine::Stub 'perldb', $IN, $OUT;
- } else {
- $term = new Term::ReadLine 'perldb', $IN, $OUT;
-
- $readline::rl_basic_word_break_characters .= "[:"
- if defined $readline::rl_basic_word_break_characters
- and index($readline::rl_basic_word_break_characters, ":") == -1;
- }
- $LINEINFO = $OUT unless defined $LINEINFO;
- $lineinfo = $console unless defined $lineinfo;
- $term->MinLine(2);
- if ($term->Features->{setHistory} and "@hist" ne "?") {
- $term->SetHistory(@hist);
- }
- }
-
- sub readline {
- if (@typeahead) {
- my $left = @typeahead;
- my $got = shift @typeahead;
- print $OUT "auto(-$left)", shift, $got, "\n";
- $term->AddHistory($got)
- if length($got) > 1 and defined $term->Features->{addHistory};
- return $got;
- }
- local $frame = 0;
- $term->readline(@_);
- }
-
- sub dump_option {
- my ($opt, $val)= @_;
- if (defined $optionVars{$opt}
- and defined $ {$optionVars{$opt}}) {
- $val = $ {$optionVars{$opt}};
- } elsif (defined $optionAction{$opt}
- and defined &{$optionAction{$opt}}) {
- $val = &{$optionAction{$opt}}();
- } elsif (defined $optionAction{$opt}
- and not defined $option{$opt}
- or defined $optionVars{$opt}
- and not defined $ {$optionVars{$opt}}) {
- $val = 'N/A';
- } else {
- $val = $option{$opt};
- }
- $val =~ s/[\\\']/\\$&/g;
- printf $OUT "%20s = '%s'\n", $opt, $val;
- }
-
- sub parse_options {
- local($_)= @_;
- while ($_ ne "") {
- s/^(\w+)(\s*$|\W)// or print($OUT "Invalid option `$_'\n"), last;
- my ($opt,$sep) = ($1,$2);
- my $val;
- if ("?" eq $sep) {
- print($OUT "Option query `$opt?' followed by non-space `$_'\n"), last
- if /^\S/;
- #&dump_option($opt);
- } elsif ($sep !~ /\S/) {
- $val = "1";
- } elsif ($sep eq "=") {
- s/^(\S*)($|\s+)//;
- $val = $1;
- } else { #{ to "let some poor schmuck bounce on the % key in B<vi>."
- my ($end) = "\\" . substr( ")]>}$sep", index("([<{",$sep), 1 ); #}
- s/^(([^\\$end]|\\[\\$end])*)$end($|\s+)// or
- print($OUT "Unclosed option value `$opt$sep$_'\n"), last;
- $val = $1;
- $val =~ s/\\([\\$end])/$1/g;
- }
- my ($option);
- my $matches =
- grep( /^\Q$opt/ && ($option = $_), @options );
- $matches = grep( /^\Q$opt/i && ($option = $_), @options )
- unless $matches;
- print $OUT "Unknown option `$opt'\n" unless $matches;
- print $OUT "Ambiguous option `$opt'\n" if $matches > 1;
- $option{$option} = $val if $matches == 1 and defined $val;
- eval "local \$frame = 0; require '$optionRequire{$option}'"
- if $matches == 1 and defined $optionRequire{$option} and defined $val;
- $ {$optionVars{$option}} = $val
- if $matches == 1
- and defined $optionVars{$option} and defined $val;
- & {$optionAction{$option}} ($val)
- if $matches == 1
- and defined $optionAction{$option}
- and defined &{$optionAction{$option}} and defined $val;
- &dump_option($option) if $matches == 1 && $OUT ne \*STDERR; # Not $rcfile
- s/^\s+//;
- }
- }
-
- sub set_list {
- my ($stem,@list) = @_;
- my $val;
- $ENV{"$ {stem}_n"} = @list;
- for $i (0 .. $#list) {
- $val = $list[$i];
- $val =~ s/\\/\\\\/g;
- $val =~ s/[\0-\37\177\200-\377]/"\\0x" . unpack('H2',$&)/eg;
- $ENV{"$ {stem}_$i"} = $val;
- }
- }
-
- sub get_list {
- my $stem = shift;
- my @list;
- my $n = delete $ENV{"$ {stem}_n"};
- my $val;
- for $i (0 .. $n - 1) {
- $val = delete $ENV{"$ {stem}_$i"};
- $val =~ s/\\((\\)|0x(..))/ $2 ? $2 : pack('H2', $3) /ge;
- push @list, $val;
- }
- @list;
- }
-
- sub catch {
- $signal = 1;
- }
-
- sub warn {
- my($msg)= join("",@_);
- $msg .= ": $!\n" unless $msg =~ /\n$/;
- print $OUT $msg;
- }
-
- sub TTY {
- if ($term) {
- &warn("Too late to set TTY!\n") if @_;
- } else {
- $tty = shift if @_;
- }
- $tty or $console;
- }
-
- sub noTTY {
- if ($term) {
- &warn("Too late to set noTTY!\n") if @_;
- } else {
- $notty = shift if @_;
- }
- $notty;
- }
-
- sub ReadLine {
- if ($term) {
- &warn("Too late to set ReadLine!\n") if @_;
- } else {
- $rl = shift if @_;
- }
- $rl;
- }
-
- sub NonStop {
- if ($term) {
- &warn("Too late to set up NonStop mode!\n") if @_;
- } else {
- $runnonstop = shift if @_;
- }
- $runnonstop;
- }
-
- sub pager {
- if (@_) {
- $pager = shift;
- $pager="|".$pager unless $pager =~ /^(\+?\>|\|)/;
- }
- $pager;
- }
-
- sub shellBang {
- if (@_) {
- $sh = quotemeta shift;
- $sh .= "\\b" if $sh =~ /\w$/;
- }
- $psh = $sh;
- $psh =~ s/\\b$//;
- $psh =~ s/\\(.)/$1/g;
- &sethelp;
- $psh;
- }
-
- sub recallCommand {
- if (@_) {
- $rc = quotemeta shift;
- $rc .= "\\b" if $rc =~ /\w$/;
- }
- $prc = $rc;
- $prc =~ s/\\b$//;
- $prc =~ s/\\(.)/$1/g;
- &sethelp;
- $prc;
- }
-
- sub LineInfo {
- return $lineinfo unless @_;
- $lineinfo = shift;
- my $stream = ($lineinfo =~ /^(\+?\>|\|)/) ? $lineinfo : ">$lineinfo";
- $emacs = ($stream =~ /^\|/);
- open(LINEINFO, "$stream") || &warn("Cannot open `$stream' for write");
- $LINEINFO = \*LINEINFO;
- my $save = select($LINEINFO);
- $| = 1;
- select($save);
- $lineinfo;
- }
-
- sub sethelp {
- $help = "
- T Stack trace.
- s [expr] Single step [in expr].
- n [expr] Next, steps over subroutine calls [in expr].
- <CR> Repeat last n or s command.
- r Return from current subroutine.
- c [line] Continue; optionally inserts a one-time-only breakpoint
- at the specified line.
- l min+incr List incr+1 lines starting at min.
- l min-max List lines min through max.
- l line List single line.
- l subname List first window of lines from subroutine.
- l List next window of lines.
- - List previous window of lines.
- w [line] List window around line.
- . Return to the executed line.
- f filename Switch to viewing filename.
- /pattern/ Search forwards for pattern; final / is optional.
- ?pattern? Search backwards for pattern; final ? is optional.
- L List all breakpoints and actions for the current file.
- S [[!]pattern] List subroutine names [not] matching pattern.
- t Toggle trace mode.
- t expr Trace through execution of expr.
- b [line] [condition]
- Set breakpoint; line defaults to the current execution line;
- condition breaks if it evaluates to true, defaults to '1'.
- b subname [condition]
- Set breakpoint at first line of subroutine.
- d [line] Delete the breakpoint for line.
- D Delete all breakpoints.
- a [line] command
- Set an action to be done before the line is executed.
- Sequence is: check for breakpoint, print line if necessary,
- do action, prompt user if breakpoint or step, evaluate line.
- A Delete all actions.
- V [pkg [vars]] List some (default all) variables in package (default current).
- Use ~pattern and !pattern for positive and negative regexps.
- X [vars] Same as \"V currentpackage [vars]\".
- x expr Evals expression in array context, dumps the result.
- O [opt[=val]] [opt\"val\"] [opt?]...
- Set or query values of options. val defaults to 1. opt can
- be abbreviated. Several options can be listed.
- recallCommand, ShellBang: chars used to recall command or spawn shell;
- pager: program for output of \"|cmd\";
- The following options affect what happens with V, X, and x commands:
- arrayDepth, hashDepth: print only first N elements ('' for all);
- compactDump, veryCompact: change style of array and hash dump;
- globPrint: whether to print contents of globs;
- DumpDBFiles: dump arrays holding debugged files;
- DumpPackages: dump symbol tables of packages;
- quote, HighBit, undefPrint: change style of string dump;
- tkRunning: run Tk while prompting (with ReadLine);
- signalLevel warnLevel dieLevel: level of verbosity;
- Option PrintRet affects printing of return value after r command,
- frame affects printing messages on entry and exit from subroutines.
- During startup options are initialized from \$ENV{PERLDB_OPTS}.
- You can put additional initialization options TTY, noTTY,
- ReadLine, and NonStop there.
- < command Define command to run before each prompt.
- > command Define command to run after each prompt.
- $prc number Redo a previous command (default previous command).
- $prc -number Redo number'th-to-last command.
- $prc pattern Redo last command that started with pattern.
- See 'O recallCommand' too.
- $psh$psh cmd Run cmd in a subprocess (reads from DB::IN, writes to DB::OUT)"
- . ( $rc eq $sh ? "" : "
- $psh [cmd] Run cmd in subshell (forces \"\$SHELL -c 'cmd'\")." ) . "
- See 'O shellBang' too.
- H -number Display last number commands (default all).
- p expr Same as \"print DB::OUT expr\" in current package.
- |dbcmd Run debugger command, piping DB::OUT to current pager.
- ||dbcmd Same as |dbcmd but DB::OUT is temporarilly select()ed as well.
- \= [alias value] Define a command alias, or list current aliases.
- command Execute as a perl statement in current package.
- R Pure-man-restart of debugger, debugger state and command-line
- options are lost.
- h [db_command] Get help [on a specific debugger command], enter |h to page.
- h h Summary of debugger commands.
- q or ^D Quit.
-
- ";
- $summary = <<"END_SUM";
- List/search source lines: Control script execution:
- l [ln|sub] List source code T Stack trace
- - or . List previous/current line s [expr] Single step [in expr]
- w [line] List around line n [expr] Next, steps over subs
- f filename View source in file <CR> Repeat last n or s
- /pattern/ Search forward r Return from subroutine
- ?pattern? Search backward c [line] Continue until line
- Debugger controls: L List break pts & actions
- O [...] Set debugger options t [expr] Toggle trace [trace expr]
- < command Command for before prompt b [ln] [c] Set breakpoint
- > command Command for after prompt b sub [c] Set breakpoint for sub
- $prc [N|pat] Redo a previous command d [line] Delete a breakpoint
- H [-num] Display last num commands D Delete all breakpoints
- = [a val] Define/list an alias a [ln] cmd Do cmd before line
- h [db_cmd] Get help on command A Delete all actions
- |[|]dbcmd Send output to pager $psh\[$psh\] syscmd Run cmd in a subprocess
- q or ^D Quit R Attempt a restart
- Data Examination: expr Execute perl code, also see: s,n,t expr
- S [[!]pat] List subroutine names [not] matching pattern
- V [Pk [Vars]] List Variables in Package. Vars can be ~pattern or !pattern.
- X [Vars] Same as \"V current_package [Vars]\".
- x expr Evals expression in array context, dumps the result.
- p expr Print expression (uses script's current package).
- END_SUM
- # '); # Fix balance of Emacs parsing
- }
-
- sub diesignal {
- local $frame = 0;
- $SIG{'ABRT'} = DEFAULT;
- kill 'ABRT', $$ if $panic++;
- print $DB::OUT "Got $_[0]!\n"; # in the case cannot continue
- local $SIG{__WARN__} = '';
- require Carp;
- local $Carp::CarpLevel = 2; # mydie + confess
- &warn(Carp::longmess("Signal @_"));
- kill 'ABRT', $$;
- }
-
- sub dbwarn {
- local $frame = 0;
- local $SIG{__WARN__} = '';
- require Carp;
- #&warn("Entering dbwarn\n");
- my ($mysingle,$mytrace) = ($single,$trace);
- $single = 0; $trace = 0;
- my $mess = Carp::longmess(@_);
- ($single,$trace) = ($mysingle,$mytrace);
- #&warn("Warning in dbwarn\n");
- &warn($mess);
- #&warn("Exiting dbwarn\n");
- }
-
- sub dbdie {
- local $frame = 0;
- local $SIG{__DIE__} = '';
- local $SIG{__WARN__} = '';
- my $i = 0; my $ineval = 0; my $sub;
- #&warn("Entering dbdie\n");
- if ($dieLevel != 2) {
- while ((undef,undef,undef,$sub) = caller(++$i)) {
- $ineval = 1, last if $sub eq '(eval)';
- }
- {
- local $SIG{__WARN__} = \&dbwarn;
- &warn(@_) if $dieLevel > 2; # Ineval is false during destruction?
- }
- #&warn("dieing quietly in dbdie\n") if $ineval and $dieLevel < 2;
- die @_ if $ineval and $dieLevel < 2;
- }
- require Carp;
- # We do not want to debug this chunk (automatic disabling works
- # inside DB::DB, but not in Carp).
- my ($mysingle,$mytrace) = ($single,$trace);
- $single = 0; $trace = 0;
- my $mess = Carp::longmess(@_);
- ($single,$trace) = ($mysingle,$mytrace);
- #&warn("dieing loudly in dbdie\n");
- die $mess;
- }
-
- sub warnLevel {
- if (@_) {
- $prevwarn = $SIG{__WARN__} unless $warnLevel;
- $warnLevel = shift;
- if ($warnLevel) {
- $SIG{__WARN__} = 'DB::dbwarn';
- } else {
- $SIG{__WARN__} = $prevwarn;
- }
- }
- $warnLevel;
- }
-
- sub dieLevel {
- if (@_) {
- $prevdie = $SIG{__DIE__} unless $dieLevel;
- $dieLevel = shift;
- if ($dieLevel) {
- $SIG{__DIE__} = 'DB::dbdie'; # if $dieLevel < 2;
- #$SIG{__DIE__} = 'DB::diehard' if $dieLevel >= 2;
- print $OUT "Stack dump during die enabled",
- ( $dieLevel == 1 ? " outside of evals" : ""), ".\n";
- print $OUT "Dump printed too.\n" if $dieLevel > 2;
- } else {
- $SIG{__DIE__} = $prevdie;
- print $OUT "Default die handler restored.\n";
- }
- }
- $dieLevel;
- }
-
- sub signalLevel {
- if (@_) {
- $prevsegv = $SIG{SEGV} unless $signalLevel;
- $prevbus = $SIG{BUS} unless $signalLevel;
- $signalLevel = shift;
- if ($signalLevel) {
- $SIG{SEGV} = 'DB::diesignal';
- $SIG{BUS} = 'DB::diesignal';
- } else {
- $SIG{SEGV} = $prevsegv;
- $SIG{BUS} = $prevbus;
- }
- }
- $signalLevel;
- }
-
- # The following BEGIN is very handy if debugger goes havoc, debugging debugger?
-
- BEGIN { # This does not compile, alas.
- $IN = \*STDIN; # For bugs before DB::OUT has been opened
- $OUT = \*STDERR; # For errors before DB::OUT has been opened
- $sh = '!';
- $rc = ',';
- @hist = ('?');
- $deep = 100; # warning if stack gets this deep
- $window = 10;
- $preview = 3;
- $sub = '';
- #$SIG{__WARN__} = "DB::dbwarn";
- #$SIG{__DIE__} = 'DB::dbdie';
- #$SIG{SEGV} = "DB::diesignal";
- #$SIG{BUS} = "DB::diesignal";
- $SIG{INT} = "DB::catch";
- #$SIG{FPE} = "DB::catch";
- #warn "SIGFPE installed";
- $warnLevel = 1 unless defined $warnLevel;
- $dieLevel = 1 unless defined $dieLevel;
- $signalLevel = 1 unless defined $signalLevel;
-
- $db_stop = 0; # Compiler warning
- $db_stop = 1 << 30;
- $level = 0; # Level of recursive debugging
- }
-
- BEGIN {$^W = $ini_warn;} # Switch warnings back
-
- #use Carp; # This did break, left for debuggin
-
- 1;
-