2 # The system variables - those indicated will need to be changed to suit your
3 # circumstances (and callsign)
5 # Copyright (c) 1998-2019 - Dirk Koopman G1TLH
7 # Note: Everything is recorded into the ring buffer (in perl terms: a numerically max sized array).
8 # To allow debugging of a category (e.g. 'chan') but not onto disc (just into the ring buffer)
9 # do: set/debug chan nologchan
11 # To print the current contents into the debug log: show/debug_ring
13 # On exit or serious error the ring buffer is printed to the current debug log
16 # Expose a localhost listener on port (default) 27755 to things like watchdbg so that they can carry on
17 # as normal, possibly with a "remember" button to permanently capture stuff observed.
20 # This is likely to be some form of triggering or filtering controlling (some portion
21 # of) ring_buffer dumping.
31 @EXPORT = qw(dbginit dbg dbgadd dbgsub dbglist dbgdump isdbg dbgclose dbgtrace confess croak cluck carp);
34 use vars qw(%dbglevel $fp $callback $cleandays $keepdays $dbgringlth);
48 our $no_stdout; # set if not running in a terminal
51 # Avoid generating "subroutine redefined" warnings with the following
52 # hack (from CGI::Carp):
53 if (!defined $DB::VERSION) {
55 eval qq( sub confess {
56 \$SIG{__DIE__} = 'DEFAULT';
57 DXDebug::dbgprintring() if DXDebug::isdbg('nologchan');
59 # DXDebug::dbg(Carp::shortmess(\@_));
60 DXDebug::longmess(\@_);
64 \$SIG{__DIE__} = 'DEFAULT';
65 DXDebug::dbgprintring() if DXDebug::isdbg('nologchan');
67 # DXDebug::dbg(Carp::longmess(\@_));
68 DXDebug::shortmess(\@_);
72 DXDebug::dbgprintring(25) if DXDebug('nologchan');
73 # DXDebug::dbg(Carp::shortmess(\@_));
74 DXDebug::longmess(\@_);
77 DXDebug::dbgprintring(25) if DXDebug('nologchan');
78 # DXDebug::dbg(Carp::longmess(\@_));
79 DXDebug::longmess(\@_);
82 CORE::die(Carp::shortmess($@)) if $@;
84 eval qq( sub confess { die Carp::longmess(\@_); };
85 sub croak { die Carp::shortmess(\@_); };
86 sub cluck { warn Carp::longmess(\@_); };
87 sub carp { warn Carp::shortmess(\@_); };
92 my $_isdbg = ''; # current dbg level we are processing
97 # say "*** in dbgtrace";
100 for (my $i = 1; (my ($pkg, $fn, $l, $subr) = caller($i)); ++$i) {
101 # say "*** in dbgtrace $i";
102 next if $pkg eq 'DXDebug';
103 # say "*** in dbgtrace after package";
104 last if $pkg =~ /Mojo/;
105 # say "*** in dbgtrace $i after mojo";
107 dbg("Stack ($i): $pkg::$subr in $fn line: $l");
119 my @l = split /\n/, $r;
121 $l =~ s/([\x00-\x08\x0B-\x1f\x7f-\xff])/sprintf("%%%02X",ord($1))/eg;
122 print "$l\n" if defined \*STDOUT && !$no_stdout;
123 my $tag = $_isdbg ? "($_isdbg) " : '(*) ';
124 my $str = "$t^$tag$l";
125 &$callback($str) if $callback;
127 shift @dbgring while (@dbgring > $dbgringlth);
130 $fp->writeunix($t, $str) unless !$fp || $dbglevel{"nolog$_isdbg"} ;
139 # add sig{__DIE__} handling
140 unless (defined $DB::VERSION) {
141 $SIG{__WARN__} = sub {
142 if ($_[0] =~ /Deep\s+recursion/i) {
144 dbg(Carp::longmess(@_));
149 dbg(Carp::shortmess(@_));
153 $SIG{__DIE__} = sub { dbg($@); dbg(Carp::longmess(@_)); };
155 # switch off STDOUT printing if we are not talking to a TTY
156 unless ($^O =~ /^MS/ || $^O =~ /^OS-2/) {
157 unless (isatty(STDOUT->fileno)) {
163 $fp = DXLog::new('debug', 'dat', 'd');
169 $SIG{__DIE__} = $SIG{__WARN__} = 'DEFAULT';
171 dbgprintring() if grep /nolog/, keys %dbglevel;
184 if ($dbglevel{$l} || $l eq 'err') {
186 for (my $o = 0; $o < length $l; $o += 16) {
187 my $c = substr $l, $o, 16;
188 my $h = unpack "H*", $c;
189 $c =~ s/[\x00-\x1f\x7f-\xff]/./g;
190 my $left = 16 - length $c;
191 $h .= ' ' x (2 * $left) if $left > 0;
192 dbg($m . sprintf("%4d:", $o) . "$h $c");
193 $m = ' ' x (length $m);
203 foreach $entry (@_) {
204 $dbglevel{$entry} = 1;
212 foreach $entry (@_) {
213 delete $dbglevel{$entry};
219 return keys (%dbglevel);
225 if ($dbglevel{$_[0]}) {
245 my $count = @dbgring;
246 $i = @dbgring-$i if $i;
247 return 0 unless $i < $count; # do nothing if there is nothing to print
251 for ( ; $i < $count; ++$i) {
252 my ($t, $str) = split /\^/, $dbgring[$i], 2;
256 $fp->writeunix($lt, "$lt^###");
257 $fp->writeunix($lt, "$lt^### RINGBUFFER START at line $i (zero base)");
258 $fp->writeunix($lt, "$lt^###");
261 my $buf = sprintf "%02d:%02d:%02d", (gmtime($t))[2,1,0];
262 $fp->writeunix($lt, "$lt^RING: $buf^$str");
266 $fp->writeunix($et, "$et^###");
267 $fp->writeunix($et, "$et^### RINGBUFFER END $l debug lines written");
268 $fp->writeunix($et, "$et^###");
277 # clean out old debug files, stop when you get a gap of more than a month
280 my $date = $fp->unixtoj($main::systime)->sub($keepdays+1);
284 my $fn = $fp->_genfn($date);
292 $date = $date->sub(1);