1 a4()P@WB-File not found. l4()P@WB- 0  01lze6WyLZ7 ψ__ub &=LV[(?# # Documentation is at the __END__ # package DB; # "private" globals my ($running, $ready, $deep, $usrctxt, $evalarg, @stack, @saved, @skippkg, @clients); my $preeval = {}; my $posteval = {}; my $ineval = {}; #### # # Globals - must be defined at startup so that clients can refer to # them right after a C # #### BEGIN { # these are hardcoded in perl source (some are magical) $DB::sub = ''; # name of current subroutine %DB::sub = (); # "filename:fromline-toline" for every known sub $DB::single = 0; # single-step flag (set it to 1 to enable stops in BEGIN/use) $DB::signal = 0; # signal flag (will cause a stop at the next line) $DB::trace = 0; # are we tracing through subroutine calls? @DB::args = (); # arguments of current subroutine or @ARGV array @DB::dbline = (); # list of lines in currently loaded file %DB::dbline = (); # actions in current file (keyed by line number) @DB::ret = (); # return value of last sub executed in list context $DB::ret = ''; # return value of last sub executed in scalar context # other "public" globals $DB::package = ''; # current package space $DB::filename = ''; # current filename $DB::subname = ''; # currently executing sub (fully qualified name) $DB::lineno = ''; # current line number $DB::VERSION = $DB::VERSION = '1.08'; # initialize private globals to avoid warnings $running = 1; # are we running, or are we stopped? @stack = (0); @clients = (); $deep = 1000; $ready = 0; @saved = (); @skippkg = (); $usrctxt = ''; $evalarg = ''; } #### # entry point for all subroutine calls # sub sub { push(@stack, $DB::single); $DB::single &= 1; $DB::single |= 4 if $#stack == $deep; if ($DB::sub eq 'DESTROY' or substr($DB::sub, -9) eq '::DESTROY' or not defined wantarray) { &$DB::sub; $DB::single |= pop(@stack); $DB::ret = undef; } elsif (wantarray) { @DB::ret = &$DB::sub; $DB::single |= pop(@stack); @DB::ret; } else { $DB::ret = &$DB::sub; $DB::single |= pop(@stack); $DB::ret; } } #### # this is called by perl for every statement # sub DB { return unless $ready; &save; ($DB::package, $DB::filename, $DB::lineno) = caller; return if @skippkg and grep { $_ eq $DB::package } @skippkg; $usrctxt = "package $DB::package;"; # this won't let them modify, alas local(*DB::dbline) = "::_<$DB::filename"; my ($stop, $action); if (($stop,$action) = split(/\0/,$DB::dbline{$DB::lineno})) { if ($stop eq '1') { $DB::signal |= 1; } else { $stop = 0 unless $stop; # avoid un_init warning $evalarg = "\$DB::signal |= do { $stop; }"; &eval; $DB::dbline{$DB::lineno} =~ s/;9($|\0)/$1/; # clear any temp breakpt } } if ($DB::single || $DB::trace || $DB::signal) { $DB::subname = ($DB::sub =~ /\'|::/) ? $DB::sub : "${DB::package}::$DB::sub"; #'; DB->loadfile($DB::filename, $DB::lineno); } $evalarg = $action, &eval if $action; if ($DB::single || $DB::signal) { _outputall($#stack . " levels deep in subroutine calls.\n") if $DB::single & 4; $DB::single = 0; $DB::signal = 0; $running = 0; &eval if ($evalarg = DB->prestop); my $c; for $c (@clients) { # perform any client-specific prestop actions &eval if ($evalarg = $c->cprestop); # Now sit in an event loop until something sets $running do { $c->idle; # call client event loop; must not block if ($running == 2) { # client wants something eval-ed &eval if ($evalarg = $c->evalcode); $running = 0; } } until $running; # perform any client-specific poststop actions &eval if ($evalarg = $c->cpoststop); } &eval if ($evalarg = DB->poststop); } ($@, $!, $,, $/, $\, $^W) = @saved;